in addition , the majority of our leases provide for variable rental revenues , such as reimbursements of real estate taxes , maintenance and insurance and may include an amount based on a percentage of the tenants ' sales . our anchor tenants are supermarkets , value-oriented apparel/discount stores and other retailers or service providers who generally sell basic necessity-type goods and services . although there is a broad shift in shopping patterns , including internet shopping that continues to affect our tenants , we believe our anchor tenants , most of which have adopted omni-channel models which help drive foot traffic , combined with convenient locations , attractive and well-maintained properties , high quality retailers and a strong tenant mix , should lessen the effects of these conditions and maintain the viability of our portfolio . pandemic the covid-19 pandemic has dramatically impacted our business due largely to the extreme hardships facing our tenants . our tenants have been impacted greatly due to a number of factors , including federal , state and local governmental and legislative mandates to temporarily close and or limit the operations of non-essential businesses , as well as encouraging or mandating most people to shelter in place and general economic conditions . while all of our markets have embarked upon a reopening of select businesses , including retailers , service providers and restaurants , the impact of these measures on the ability of our tenants to pay rent is indeterminable at this time . many of our tenants have moved to include on-line sales with curbside pickup or delivery , including restaurants , apparel discounters and electronics . the grocery stores and other retailers with a grocery component that anchor the majority of our shopping centers have increased sales in this environment . the economy continues to gain traction in all of our markets with most of our tenants open for business . based on annualized base rents , including our share of interest in real estate joint ventures or partnerships , we have estimated that 44 % and 19 % of our tenants are designated as essential businesses and restaurants , respectively . during 2020 , we have experienced an increase from 2019 in tenant fallout of approximately 658,000 square feet representing approximately $ 12.1 million in annualized base rents , either directly or through our interest in real estate joint ventures or partnerships . 28 beginning in the second quarter of 2020 , we entered into deferrals and abatement agreements with our tenants to provide some relief to the tenants greatly impacted by the covid-19 shut down . as of february 12 , 2021 , we have negotiated deferrals with tenants on approximately 995 leases , of which nearly $ 17.9 million remains of rental payments that have been billed or are to be billed and are primarily scheduled to be repaid by december 31 , 2021. in addition , in 2020 , we have reduced rental revenues by $ 36.1 million due to lease related reserves and write-offs , of which $ 15.0 million is associated with straight-line rent receivables . due to the anticipated impact from the administration of the covid-19 vaccinations and the likely ensuing increase in our tenant operations , our current expectation is that rent collections will trend upward throughout 2021 ; however , no assurances can be given that this will occur due to the uncertainties surrounding our tenants ' reopening and any resurgence of the pandemic and the governmental reaction to any resurgence . as of february 12 , 2021 , tenant billing data , which includes base minimum rental revenues and escrows for common area maintenance ( “ cam ” ) , real estate taxes and insurance either directly or through our interest in real estate joint ventures or partnerships , was as follows : replace_table_token_7_th ​ to conserve liquidity and preserve financial flexibility in light of the uncertainty surrounding the impact of covid-19 , we reduced our dividend payments beginning in the second quarter of 2020 to $ .18 per share from $ .395 per share . due to the magnitude of gain generated by our dispositions during 2020 , we paid a special dividend near year-end of $ .36 per share . on february 18 , 2021 , our board of trust managers approved a first quarter 2021 dividend of $ .30 per common share . absent a significant deterioration in cash collections , we believe our cash flow from operations will meet our planned capital needs for 2021 ; however , no assurances can be given that this level of cash flow will occur due to the uncertainty in the duration and restrictions of operations for our tenants . further , the ability to draw down under our revolving credit facility should provide ample liquidity for us to operate and maintain compliance with our debt covenants . while all of our offices are currently open , many of our employees continue to work remotely to stay healthy , support operations and in response to stay-at-home mandates or recommendations . working remotely presents various challenges , including ( but not all inclusive ) concerns about productivity , connectivity , consumer privacy and it security . 29 strategy our goal is to remain a leader in owning and operating top-tier neighborhood and community shopping centers and mixed-use properties in certain markets of the united states . our strategic initiatives include : ( 1 ) owning quality shopping centers in preferred locations that attract strong tenants , ( 2 ) growing net income from our existing portfolio by increasing occupancy and rental rates , ( 3 ) raising net asset value and cash flow through quality acquisitions and new developments , ( 4 ) continuously redeveloping our existing shopping centers to increase cash flow and enhance the value of the centers and ( 5 ) maintaining a strong , flexible consolidated balance sheet and a well-managed debt maturity schedule . story_separator_special_tag we are uncertain whether we will experience additional impairment related to both our properties and investment in real estate joint ventures and partnerships if the effects of covid-19 are prolonged over a significant period of time ; however , we are cautiously optimistic that with introduction of the vaccinations that the economy and our tenants ' economic health will improve throughout 2021. further , additional impairment could be recognized if management 's or our partners ' plans to hold a property change due to new opportunities to de-risk the portfolio . 34 results of operations currently , the covid-19 pandemic has created uncertainties surrounding the global economy and financial markets . additionally , as noted earlier , tenants have been markedly impacted by the pandemic , which has affected our results . as a result , the full magnitude of the pandemic and the ultimate effect upon our future revenues and operations is uncertain at this time . while we are cautiously optimistic there will be a gradual improvement in the retail environment resulting from the distribution of vaccinations and the related re-opening of the economy , we do not expect revenues and operations to return to pre-covid levels in the near term . comparison of the year ended december 31 , 2020 to the year ended december 31 , 2019 the following table is a summary of certain items in income from continuing operations from our consolidated statements of operations , which we believe represent items that significantly changed during 2020 as compared to the same period in 2019 : replace_table_token_10_th ​ revenues the decrease in revenues of $ 52.7 million is attributable primarily to a decrease of $ 35.4 million for potentially uncollectible revenues associated primarily with the covid-19 pandemic and the impact of $ 28.4 million related to dispositions . our revenues have decreased $ 3.2 million from rent abatements and have also declined by approximately $ 3.0 million due primarily to the number of cash basis tenants and changes in rental rates and occupancy . partially offsetting this decrease is revenue from acquisitions of $ 17.3 million . depreciation and amortization the increase in depreciation and amortization of $ 14.3 million is attributable primarily to the $ 19.1 million impact of acquisitions and new developments and an increase of $ 1.8 million from other capital activities at our existing portfolio and redevelopment centers , which is partially offset by dispositions of $ 6.6 million . operating expenses the decrease in operating expense of $ 3.5 million is attributable primarily to a $ 4.7 million reduction in expense associated with deferred compensation ( see general and administrative expenses and interest and other income , net below for additional information ) and the impact of dispositions of $ 4.6 million . effective the first quarter of 2020 , the allocation of the fair value adjustments associated with the assets held in the grantor trust was changed to reflect the current expense classification of the employees in the deferred compensation plan ; therefore , all changes to the liability are recorded in general and administrative expense with no allocation to operating expense unless future employee expense classifications change . partially offsetting this decrease is an increase in expense of $ 4.6 million from acquisitions and mixed-use operations and an increase in insurance costs between the respective periods of $ 1.3 million . 35 real estate taxes , net the $ 1.8 million increase in real estate taxes , net is attributable primarily to the impact from acquisitions and mixed-use centers of $ 3.7 million , and an increase of $ 1.5 million attributable primarily to rate and valuation changes for the portfolio between the respective periods , which is partially offset by dispositions of $ 3.4 million . impairment loss the increase in impairment loss of $ 24.1 million is attributable primarily to losses recognized in 2020 associated with three centers , of which one had been sold in 2020. subsequent to year-end , we sold another of these centers , and one is currently on the market . general and administrative expenses the increase in general and administrative expenses of $ 1.5 million is attributable primarily to a fair value increase of $ 2.3 million associated with assets held in a grantor trust related to deferred compensation offset by a reduction in primarily travel and convention related expenses due to the covid-19 pandemic . interest expense , net net interest expense increased $ 3.5 million or 6.2 % . the components of net interest expense were as follows ( in thousands ) : replace_table_token_11_th ​ the increase in net interest expense is attributable primarily to a reduction in capitalized interest , which is offset by a slight reduction in gross interest expense . the reduction of capitalized interest is primarily attributable to the near completion of two of the residential portions of our new developments . the decrease in gross interest expense is primarily attributable to a reduction in the weighted average interest rates due to the difference in outstanding balances under the revolver between the respective periods , which is offset by an increase in the weighted average debt outstanding associated primarily with acquisitions . for the year ended december 31 , 2020 , the weighted average debt outstanding was $ 1.9 billion at a weighted average interest rate of 3.7 % as compared to $ 1.8 billion outstanding at a weighted average interest rate of 4.0 % in the same period of 2019. interest and other income , net the decrease of $ 3.9 million in interest and other income , net is attributable primarily to a fair value reduction of $ 2.4 million associated with assets held in a grantor trust related to deferred compensation and a decrease in interest income of $ 2.5 million associated with short-term and other investments . partially offsetting this decrease is $ 1.1 million associated with the components of net periodic benefit cost from our pension plan between the

debt total debt outstanding was $ 1.8 billion at december 31 , 2020 , which bears interest at fixed rates and includes $ 40 million that bears interest at variable rates . additionally , of our total debt , $ 349.5 million was secured by operating centers while the remaining $ 1.5 billion was unsecured . we also had letters of credit totaling $ 7.9 million outstanding at december 31 , 2020. our debt maturities for 2021 and 2022 total $ 18.8 million and $ 308.3 million , respectively ( see note 6 for additional information on debt maturities ) . for 2021 , we expect to fund our outstanding maturities through our excess cash flow generated by our operating properties , credit facilities and cash generated from dispositions . the 2022 maturities are expected be funded through our excess cash flow generated by our operating properties , credit facilities , cash generated from dispositions or with proceeds from the issuance of long-term debt . at december 31 , 2020 , we have a $ 500 million unsecured revolving credit facility , which expires in march 2024 and provides borrowing rates that float at a margin over libor plus a facility fee . at december 31 , 2020 , the borrowing margin and facility fee , which are priced off a grid that is tied to our senior unsecured credit ratings , were 82.5 and 15 basis points , respectively . the facility also contains a competitive bid feature that allows us to request bids for up to $ 250 million . additionally , an accordion feature allows us to increase the facility amount up to $ 850 million . as of february 15 , 2021 , we had no amounts outstanding , and the available balance was $ 497.9 million , net of $ 1.9 million in outstanding letters of credit . at december 31 , 2020 , we have a $ 10 million unsecured short-term facility that we maintain for cash management purposes .


 Write a concise suspicious activity report of the following text delimited by triple backquotes. Return your response as a formal report which covers the key points highlighting the location,dates,entity names and account holder information in chronological order of the text.
     ```debt total debt outstanding was $ 1.8 billion at december 31 , 2020 , which bears interest at fixed rates and includes $ 40 million that bears interest at variable rates . additionally , of our total debt , $ 349.5 million was secured by operating centers while the remaining $ 1.5 billion was unsecured . we also had letters of credit totaling $ 7.9 million outstanding at december 31 , 2020. our debt maturities for 2021 and 2022 total $ 18.8 million and $ 308.3 million , respectively ( see note 6 for additional information on debt maturities ) . for 2021 , we expect to fund our outstanding maturities through our excess cash flow generated by our operating properties , credit facilities and cash generated from dispositions . the 2022 maturities are expected be funded through our excess cash flow generated by our operating properties , credit facilities , cash generated from dispositions or with proceeds from the issuance of long-term debt . at december 31 , 2020 , we have a $ 500 million unsecured revolving credit facility , which expires in march 2024 and provides borrowing rates that float at a margin over libor plus a facility fee . at december 31 , 2020 , the borrowing margin and facility fee , which are priced off a grid that is tied to our senior unsecured credit ratings , were 82.5 and 15 basis points , respectively . the facility also contains a competitive bid feature that allows us to request bids for up to $ 250 million . additionally , an accordion feature allows us to increase the facility amount up to $ 850 million . as of february 15 , 2021 , we had no amounts outstanding , and the available balance was $ 497.9 million , net of $ 1.9 million in outstanding letters of credit . at december 31 , 2020 , we have a $ 10 million unsecured short-term facility that we maintain for cash management purposes .
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 Suspicious Activity Report : in addition , the majority of our leases provide for variable rental revenues , such as reimbursements of real estate taxes , maintenance and insurance and may include an amount based on a percentage of the tenants ' sales . our anchor tenants are supermarkets , value-oriented apparel/discount stores and other retailers or service providers who generally sell basic necessity-type goods and services . although there is a broad shift in shopping patterns , including internet shopping that continues to affect our tenants , we believe our anchor tenants , most of which have adopted omni-channel models which help drive foot traffic , combined with convenient locations , attractive and well-maintained properties , high quality retailers and a strong tenant mix , should lessen the effects of these conditions and maintain the viability of our portfolio . pandemic the covid-19 pandemic has dramatically impacted our business due largely to the extreme hardships facing our tenants . our tenants have been impacted greatly due to a number of factors , including federal , state and local governmental and legislative mandates to temporarily close and or limit the operations of non-essential businesses , as well as encouraging or mandating most people to shelter in place and general economic conditions . while all of our markets have embarked upon a reopening of select businesses , including retailers , service providers and restaurants , the impact of these measures on the ability of our tenants to pay rent is indeterminable at this time . many of our tenants have moved to include on-line sales with curbside pickup or delivery , including restaurants , apparel discounters and electronics . the grocery stores and other retailers with a grocery component that anchor the majority of our shopping centers have increased sales in this environment . the economy continues to gain traction in all of our markets with most of our tenants open for business . based on annualized base rents , including our share of interest in real estate joint ventures or partnerships , we have estimated that 44 % and 19 % of our tenants are designated as essential businesses and restaurants , respectively . during 2020 , we have experienced an increase from 2019 in tenant fallout of approximately 658,000 square feet representing approximately $ 12.1 million in annualized base rents , either directly or through our interest in real estate joint ventures or partnerships . 28 beginning in the second quarter of 2020 , we entered into deferrals and abatement agreements with our tenants to provide some relief to the tenants greatly impacted by the covid-19 shut down . as of february 12 , 2021 , we have negotiated deferrals with tenants on approximately 995 leases , of which nearly $ 17.9 million remains of rental payments that have been billed or are to be billed and are primarily scheduled to be repaid by december 31 , 2021. in addition , in 2020 , we have reduced rental revenues by $ 36.1 million due to lease related reserves and write-offs , of which $ 15.0 million is associated with straight-line rent receivables . due to the anticipated impact from the administration of the covid-19 vaccinations and the likely ensuing increase in our tenant operations , our current expectation is that rent collections will trend upward throughout 2021 ; however , no assurances can be given that this will occur due to the uncertainties surrounding our tenants ' reopening and any resurgence of the pandemic and the governmental reaction to any resurgence . as of february 12 , 2021 , tenant billing data , which includes base minimum rental revenues and escrows for common area maintenance ( “ cam ” ) , real estate taxes and insurance either directly or through our interest in real estate joint ventures or partnerships , was as follows : replace_table_token_7_th ​ to conserve liquidity and preserve financial flexibility in light of the uncertainty surrounding the impact of covid-19 , we reduced our dividend payments beginning in the second quarter of 2020 to $ .18 per share from $ .395 per share . due to the magnitude of gain generated by our dispositions during 2020 , we paid a special dividend near year-end of $ .36 per share . on february 18 , 2021 , our board of trust managers approved a first quarter 2021 dividend of $ .30 per common share . absent a significant deterioration in cash collections , we believe our cash flow from operations will meet our planned capital needs for 2021 ; however , no assurances can be given that this level of cash flow will occur due to the uncertainty in the duration and restrictions of operations for our tenants . further , the ability to draw down under our revolving credit facility should provide ample liquidity for us to operate and maintain compliance with our debt covenants . while all of our offices are currently open , many of our employees continue to work remotely to stay healthy , support operations and in response to stay-at-home mandates or recommendations . working remotely presents various challenges , including ( but not all inclusive ) concerns about productivity , connectivity , consumer privacy and it security . 29 strategy our goal is to remain a leader in owning and operating top-tier neighborhood and community shopping centers and mixed-use properties in certain markets of the united states . our strategic initiatives include : ( 1 ) owning quality shopping centers in preferred locations that attract strong tenants , ( 2 ) growing net income from our existing portfolio by increasing occupancy and rental rates , ( 3 ) raising net asset value and cash flow through quality acquisitions and new developments , ( 4 ) continuously redeveloping our existing shopping centers to increase cash flow and enhance the value of the centers and ( 5 ) maintaining a strong , flexible consolidated balance sheet and a well-managed debt maturity schedule . story_separator_special_tag we are uncertain whether we will experience additional impairment related to both our properties and investment in real estate joint ventures and partnerships if the effects of covid-19 are prolonged over a significant period of time ; however , we are cautiously optimistic that with introduction of the vaccinations that the economy and our tenants ' economic health will improve throughout 2021. further , additional impairment could be recognized if management 's or our partners ' plans to hold a property change due to new opportunities to de-risk the portfolio . 34 results of operations currently , the covid-19 pandemic has created uncertainties surrounding the global economy and financial markets . additionally , as noted earlier , tenants have been markedly impacted by the pandemic , which has affected our results . as a result , the full magnitude of the pandemic and the ultimate effect upon our future revenues and operations is uncertain at this time . while we are cautiously optimistic there will be a gradual improvement in the retail environment resulting from the distribution of vaccinations and the related re-opening of the economy , we do not expect revenues and operations to return to pre-covid levels in the near term . comparison of the year ended december 31 , 2020 to the year ended december 31 , 2019 the following table is a summary of certain items in income from continuing operations from our consolidated statements of operations , which we believe represent items that significantly changed during 2020 as compared to the same period in 2019 : replace_table_token_10_th ​ revenues the decrease in revenues of $ 52.7 million is attributable primarily to a decrease of $ 35.4 million for potentially uncollectible revenues associated primarily with the covid-19 pandemic and the impact of $ 28.4 million related to dispositions . our revenues have decreased $ 3.2 million from rent abatements and have also declined by approximately $ 3.0 million due primarily to the number of cash basis tenants and changes in rental rates and occupancy . partially offsetting this decrease is revenue from acquisitions of $ 17.3 million . depreciation and amortization the increase in depreciation and amortization of $ 14.3 million is attributable primarily to the $ 19.1 million impact of acquisitions and new developments and an increase of $ 1.8 million from other capital activities at our existing portfolio and redevelopment centers , which is partially offset by dispositions of $ 6.6 million . operating expenses the decrease in operating expense of $ 3.5 million is attributable primarily to a $ 4.7 million reduction in expense associated with deferred compensation ( see general and administrative expenses and interest and other income , net below for additional information ) and the impact of dispositions of $ 4.6 million . effective the first quarter of 2020 , the allocation of the fair value adjustments associated with the assets held in the grantor trust was changed to reflect the current expense classification of the employees in the deferred compensation plan ; therefore , all changes to the liability are recorded in general and administrative expense with no allocation to operating expense unless future employee expense classifications change . partially offsetting this decrease is an increase in expense of $ 4.6 million from acquisitions and mixed-use operations and an increase in insurance costs between the respective periods of $ 1.3 million . 35 real estate taxes , net the $ 1.8 million increase in real estate taxes , net is attributable primarily to the impact from acquisitions and mixed-use centers of $ 3.7 million , and an increase of $ 1.5 million attributable primarily to rate and valuation changes for the portfolio between the respective periods , which is partially offset by dispositions of $ 3.4 million . impairment loss the increase in impairment loss of $ 24.1 million is attributable primarily to losses recognized in 2020 associated with three centers , of which one had been sold in 2020. subsequent to year-end , we sold another of these centers , and one is currently on the market . general and administrative expenses the increase in general and administrative expenses of $ 1.5 million is attributable primarily to a fair value increase of $ 2.3 million associated with assets held in a grantor trust related to deferred compensation offset by a reduction in primarily travel and convention related expenses due to the covid-19 pandemic . interest expense , net net interest expense increased $ 3.5 million or 6.2 % . the components of net interest expense were as follows ( in thousands ) : replace_table_token_11_th ​ the increase in net interest expense is attributable primarily to a reduction in capitalized interest , which is offset by a slight reduction in gross interest expense . the reduction of capitalized interest is primarily attributable to the near completion of two of the residential portions of our new developments . the decrease in gross interest expense is primarily attributable to a reduction in the weighted average interest rates due to the difference in outstanding balances under the revolver between the respective periods , which is offset by an increase in the weighted average debt outstanding associated primarily with acquisitions . for the year ended december 31 , 2020 , the weighted average debt outstanding was $ 1.9 billion at a weighted average interest rate of 3.7 % as compared to $ 1.8 billion outstanding at a weighted average interest rate of 4.0 % in the same period of 2019. interest and other income , net the decrease of $ 3.9 million in interest and other income , net is attributable primarily to a fair value reduction of $ 2.4 million associated with assets held in a grantor trust related to deferred compensation and a decrease in interest income of $ 2.5 million associated with short-term and other investments . partially offsetting this decrease is $ 1.1 million associated with the components of net periodic benefit cost from our pension plan between the

