, 2020 and excludes three properties owned by two unconsolidated joint ventures in which we own 51 % and 50 % interests . for more information regarding our properties classified as held for sale and our two unconsolidated joint ventures , see note 3 to the notes to consolidated financial statements included in part iv , item 15 of this annual report on form 10-k. occupancy data for our properties as of december 31 , 2020 and 2019 was as follows ( square feet in thousands ) : replace_table_token_3_th ( 1 ) based on properties we owned on december 31 , 2020 and 2019 , respectively . ( 2 ) based on properties we owned continuously since january 1 , 2019 ; excludes properties classified as held for sale , properties undergoing significant redevelopment , if any , and three properties owned by two unconsolidated joint ventures in which we own 51 % and 50 % interests . ( 3 ) includes one leasable land parcel . ( 4 ) subject to changes when space is remeasured or reconfigured for tenants . ( 5 ) percent leased includes ( i ) space being fitted out for tenant occupancy pursuant to our lease agreements , if any , and ( ii ) space which is leased , but is not occupied or is being offered for sublease by tenants , if any , as of the measurement date . the average effective rental rate per square foot for our properties for the years ended december 31 , 2020 and 2019 are as follows : replace_table_token_4_th ( 1 ) average effective rental rate per square foot represents total rental income during the period specified divided by the average rentable square feet leased during the period specified . ( 2 ) based on properties we owned on december 31 , 2020 and 2019 , respectively . ( 3 ) based on properties we owned continuously since january 1 , 2019 ; excludes properties classified as held for sale , properties undergoing significant redevelopment , if any , and three properties owned by two unconsolidated joint ventures in which we own 51 % and 50 % interests . during the year ended december 31 , 2020 , changes in rentable square feet leased and available for lease at our properties were as follows ( square feet in thousands ) : replace_table_token_5_th ( 1 ) based on leases entered during the year ended december 31 , 2020 . ( 2 ) rentable square feet are subject to changes when space is remeasured or reconfigured for tenants . 49 leases at our properties totaling approximately 2,334,000 rentable square feet expired during the year ended december 31 , 2020. during the year ended december 31 , 2020 , we entered leases totaling approximately 1,965,000 rentable square feet , including lease renewals of approximately 1,691,000 rentable square feet and new leases of approximately 274,000 rentable square feet . the weighted ( by rentable square feet ) average rents were 6.9 % above prior rents for the same space and the weighted ( by rentable square feet ) average lease term for new and renewal leases entered during the year ended december 31 , 2020 was 7.3 years . during the year ended december 31 , 2020 , commitments made for expenditures , such as tenant improvements and leasing costs , in connection with leasing space at our properties were as follows ( square feet in thousands ) : replace_table_token_6_th ( 1 ) includes commitments made for leasing expenditures and concessions , such as tenant improvements , leasing commissions , tenant reimbursements and free rent . during the year ended december 31 , 2020 , changes in effective rental rates per square foot achieved for new leases and lease renewals at our properties that commenced during the year ended december 31 , 2020 , when compared to prior effective rental rates per square foot in effect for the same space ( and excluding space acquired vacant ) , were as follows ( square feet in thousands ) : replace_table_token_7_th ( 1 ) effective rental rate includes contractual base rents from our tenants pursuant to our lease agreements , plus straight line rent adjustments and estimated expense reimbursements to be paid to us , and excluding lease value amortization . during the years ended december 31 , 2020 and 2019 , amounts capitalized at our properties for lease related costs , building improvements and development , redevelopment and other activities were as follows : replace_table_token_8_th ( 1 ) lease related costs generally include capital expenditures used to improve tenants ' space or amounts paid directly to tenants to improve their space and leasing related costs , such as brokerage commissions and other tenant inducements . ( 2 ) building improvements generally include expenditures to replace obsolete building components and expenditures that extend the useful life of existing assets . ( 3 ) development , redevelopment and other activities generally include capital expenditure projects that reposition a property or result in new sources of revenue . as of december 31 , 2020 , we have estimated unspent leasing related obligations of $ 51,913 , of which we expect to spend $ 19,179 over the next 12 months . 50 as of december 31 , 2020 , we had leases at our properties totaling approximately 3,657,000 rentable square feet that were scheduled to expire during 2021. as of february 18 , 2021 , we expect tenants with leases totaling approximately 2,614,000 rentable square feet that are scheduled to expire through december 31 , 2021 , to not renew their leases upon expiration and we can not be sure as to whether other tenants will renew their leases upon expiration . story_separator_special_tag 55 results of operations ( amounts in thousands , except per share amounts ) year ended december 31 , 2020 , compared to year ended december 31 , 2019 replace_table_token_11_th n/m - not meaningful ( 1 ) comparable properties consists of 177 properties we owned on december 31 , 2020 and which we owned continuously since january 1 , 2019 and excludes properties classified as held for sale , properties undergoing significant redevelopment , if any , and three properties owned by two unconsolidated joint ventures in which we own 51 % and 50 % interests . ( 2 ) our definition of net operating income , or noi , and our reconciliation of net income to noi are included below under the heading “ non-gaap financial measures . ” references to changes in the income and expense categories below relate to the comparison of consolidated results for the year ended december 31 , 2020 , compared to the year ended december 31 , 2019. for a comparison of consolidated results for the year ended december 31 , 2019 compared to the year ended december 31 , 2018 , see part ii , item 7 “ management 's discussion and analysis of financial condition and results of operations ” in our annual report on form 10-k for the fiscal year ended december 31 , 2019 . 56 rental income . the decrease in rental income reflects decreases in rental income of $ 74,411 as a result of property disposition activities , $ 10,078 related to comparable properties and $ 6,204 related to a property undergoing significant redevelopment that became vacant in september 2019 , offset by an increase in rental income of $ 208 related to acquired properties . the decrease in rental income for comparable properties is primarily due to reductions in occupied space at certain of our properties in 2020 , certain below market lease intangibles becoming fully amortized , termination fee revenue totaling $ 1,543 recorded at certain of our comparable properties in 2019 , reductions in reimbursement income due to reductions in expenses that are reimbursable to us by our tenants as a result of the covid-19 pandemic and resulting decrease in space utilization , and decreased parking revenue at certain of our comparable properties due to lower parking activity resulting from the covid-19 pandemic . rental income includes non-cash straight line rent adjustments totaling $ 16,079 in 2020 and $ 27,507 in 2019 , and amortization of acquired leases and assumed lease obligations totaling ( $ 5,440 ) in 2020 and ( $ 2,710 ) in 2019. real estate taxes . the decrease in real estate taxes reflects a decrease in real estate taxes of $ 7,765 as a result of property disposition activities , a decrease of $ 803 for a property undergoing significant redevelopment and a decrease of $ 80 for comparable properties , offset by increases in real estate taxes of $ 50 for acquired properties . real estate taxes for comparable properties declined primarily due to the effect of lower real estate tax valuation assessments resulting from successful real estate tax appeals at certain of our properties since january 1 , 2019. utility expenses . the decrease in utility expenses reflects a decrease in utility expenses of $ 4,796 as a result of property disposition activities and a decrease in utility expenses for comparable properties of $ 4,188 , offset by an increase in utility expenses for a property undergoing significant redevelopment of $ 66. utility expenses for comparable properties declined primarily due to a decrease in electricity and water usage resulting from cost savings initiatives implemented by our manager , rmr llc , in response to decreased space utilization at our properties as a result of the covid-19 pandemic , as well as the implementation of real time energy management programs at certain of our properties in 2020. other operating expenses . other operating expenses consist of salaries and benefit costs of property level personnel , repairs and maintenance expense , cleaning expense , other direct costs of operating our properties and property management fees . the decrease in other operating expenses reflects a decrease of $ 13,448 as a result of property disposition activities , a decrease of $ 1,720 for comparable properties and a decrease of $ 436 related to a property undergoing significant redevelopment , offset by an increase in other operating expenses related to acquired properties of $ 126. other operating expenses for comparable properties declined primarily due to lower net cleaning costs resulting from cost savings initiatives implemented by our manager , rmr llc , in response to decreased space utilization at our properties as a result of the covid-19 pandemic , which were partially offset by an increase in cleaning costs related to more frequent cleaning and sanitizing practices at our properties to help mitigate the spread of covid-19 , lower snow removal costs and lower parking garage maintenance costs due to lower parking activity at certain of our properties resulting from the covid-19 pandemic , partially offset by higher insurance costs in 2020. depreciation and amortization . the decrease in depreciation and amortization primarily reflects a decrease of $ 23,092 as a result of property disposition activities , a decrease for comparable properties of $ 12,891 and a decrease related to a property undergoing significant redevelopment of $ 2,567 , offset by an increase related to acquired properties of $ 231. depreciation and amortization for comparable properties and the property undergoing significant redevelopment declined due to certain leasing related assets becoming fully depreciated in 2020 , partially offset by depreciation and amortization of improvements made to certain of our properties during 2019 and 2020. loss on impairment of real estate . we recorded a $ 2,954 loss on impairment of real estate in 2020 to reduce the carrying value of four properties to their estimated fair value less costs to sell . we recorded a $ 22,255 loss on impairment of real estate

liquidity and capital resources our operating liquidity and resources ( dollar amounts in thousands ) our principal sources of funds to meet operating and capital expenses , pay debt service obligations and make distributions to our shareholders are the operating cash flows we generate from our properties , net proceeds from property sales and borrowings under our revolving credit facility . we believe that these sources of funds will be sufficient to meet our operating and capital expenses , pay debt service obligations and make distributions to our shareholders for the next 12 months and for the foreseeable future thereafter . our future cash flows from operating activities will depend primarily upon : our ability to collect rent from our tenants ; our ability to maintain or increase the occupancy of , and the rental rates at , our properties ; our ability to control operating and capital expenses at our properties ; our ability to successfully sell properties that we market for sale ; our ability to develop or redevelop properties to produce cash flows in excess of our cost of capital ; and our ability to purchase additional properties which produce cash flows from operations in excess of our cost of acquisition capital and property operating expenses and capital expenses . with $ 750,000 available under our revolving credit facility as of february 18 , 2021 and no significant debt maturities until 2022 , we believe that we are well positioned to weather the present disruptions facing the real estate industry and the economy generally . as a result of the covid-19 pandemic , we have received requests from some of our tenants for rent assistance .


 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.
     ```liquidity and capital resources our operating liquidity and resources ( dollar amounts in thousands ) our principal sources of funds to meet operating and capital expenses , pay debt service obligations and make distributions to our shareholders are the operating cash flows we generate from our properties , net proceeds from property sales and borrowings under our revolving credit facility . we believe that these sources of funds will be sufficient to meet our operating and capital expenses , pay debt service obligations and make distributions to our shareholders for the next 12 months and for the foreseeable future thereafter . our future cash flows from operating activities will depend primarily upon : our ability to collect rent from our tenants ; our ability to maintain or increase the occupancy of , and the rental rates at , our properties ; our ability to control operating and capital expenses at our properties ; our ability to successfully sell properties that we market for sale ; our ability to develop or redevelop properties to produce cash flows in excess of our cost of capital ; and our ability to purchase additional properties which produce cash flows from operations in excess of our cost of acquisition capital and property operating expenses and capital expenses . with $ 750,000 available under our revolving credit facility as of february 18 , 2021 and no significant debt maturities until 2022 , we believe that we are well positioned to weather the present disruptions facing the real estate industry and the economy generally . as a result of the covid-19 pandemic , we have received requests from some of our tenants for rent assistance .
```    
 Suspicious Activity Report : , 2020 and excludes three properties owned by two unconsolidated joint ventures in which we own 51 % and 50 % interests . for more information regarding our properties classified as held for sale and our two unconsolidated joint ventures , see note 3 to the notes to consolidated financial statements included in part iv , item 15 of this annual report on form 10-k. occupancy data for our properties as of december 31 , 2020 and 2019 was as follows ( square feet in thousands ) : replace_table_token_3_th ( 1 ) based on properties we owned on december 31 , 2020 and 2019 , respectively . ( 2 ) based on properties we owned continuously since january 1 , 2019 ; excludes properties classified as held for sale , properties undergoing significant redevelopment , if any , and three properties owned by two unconsolidated joint ventures in which we own 51 % and 50 % interests . ( 3 ) includes one leasable land parcel . ( 4 ) subject to changes when space is remeasured or reconfigured for tenants . ( 5 ) percent leased includes ( i ) space being fitted out for tenant occupancy pursuant to our lease agreements , if any , and ( ii ) space which is leased , but is not occupied or is being offered for sublease by tenants , if any , as of the measurement date . the average effective rental rate per square foot for our properties for the years ended december 31 , 2020 and 2019 are as follows : replace_table_token_4_th ( 1 ) average effective rental rate per square foot represents total rental income during the period specified divided by the average rentable square feet leased during the period specified . ( 2 ) based on properties we owned on december 31 , 2020 and 2019 , respectively . ( 3 ) based on properties we owned continuously since january 1 , 2019 ; excludes properties classified as held for sale , properties undergoing significant redevelopment , if any , and three properties owned by two unconsolidated joint ventures in which we own 51 % and 50 % interests . during the year ended december 31 , 2020 , changes in rentable square feet leased and available for lease at our properties were as follows ( square feet in thousands ) : replace_table_token_5_th ( 1 ) based on leases entered during the year ended december 31 , 2020 . ( 2 ) rentable square feet are subject to changes when space is remeasured or reconfigured for tenants . 49 leases at our properties totaling approximately 2,334,000 rentable square feet expired during the year ended december 31 , 2020. during the year ended december 31 , 2020 , we entered leases totaling approximately 1,965,000 rentable square feet , including lease renewals of approximately 1,691,000 rentable square feet and new leases of approximately 274,000 rentable square feet . the weighted ( by rentable square feet ) average rents were 6.9 % above prior rents for the same space and the weighted ( by rentable square feet ) average lease term for new and renewal leases entered during the year ended december 31 , 2020 was 7.3 years . during the year ended december 31 , 2020 , commitments made for expenditures , such as tenant improvements and leasing costs , in connection with leasing space at our properties were as follows ( square feet in thousands ) : replace_table_token_6_th ( 1 ) includes commitments made for leasing expenditures and concessions , such as tenant improvements , leasing commissions , tenant reimbursements and free rent . during the year ended december 31 , 2020 , changes in effective rental rates per square foot achieved for new leases and lease renewals at our properties that commenced during the year ended december 31 , 2020 , when compared to prior effective rental rates per square foot in effect for the same space ( and excluding space acquired vacant ) , were as follows ( square feet in thousands ) : replace_table_token_7_th ( 1 ) effective rental rate includes contractual base rents from our tenants pursuant to our lease agreements , plus straight line rent adjustments and estimated expense reimbursements to be paid to us , and excluding lease value amortization . during the years ended december 31 , 2020 and 2019 , amounts capitalized at our properties for lease related costs , building improvements and development , redevelopment and other activities were as follows : replace_table_token_8_th ( 1 ) lease related costs generally include capital expenditures used to improve tenants ' space or amounts paid directly to tenants to improve their space and leasing related costs , such as brokerage commissions and other tenant inducements . ( 2 ) building improvements generally include expenditures to replace obsolete building components and expenditures that extend the useful life of existing assets . ( 3 ) development , redevelopment and other activities generally include capital expenditure projects that reposition a property or result in new sources of revenue . as of december 31 , 2020 , we have estimated unspent leasing related obligations of $ 51,913 , of which we expect to spend $ 19,179 over the next 12 months . 50 as of december 31 , 2020 , we had leases at our properties totaling approximately 3,657,000 rentable square feet that were scheduled to expire during 2021. as of february 18 , 2021 , we expect tenants with leases totaling approximately 2,614,000 rentable square feet that are scheduled to expire through december 31 , 2021 , to not renew their leases upon expiration and we can not be sure as to whether other tenants will renew their leases upon expiration . story_separator_special_tag 55 results of operations ( amounts in thousands , except per share amounts ) year ended december 31 , 2020 , compared to year ended december 31 , 2019 replace_table_token_11_th n/m - not meaningful ( 1 ) comparable properties consists of 177 properties we owned on december 31 , 2020 and which we owned continuously since january 1 , 2019 and excludes properties classified as held for sale , properties undergoing significant redevelopment , if any , and three properties owned by two unconsolidated joint ventures in which we own 51 % and 50 % interests . ( 2 ) our definition of net operating income , or noi , and our reconciliation of net income to noi are included below under the heading “ non-gaap financial measures . ” references to changes in the income and expense categories below relate to the comparison of consolidated results for the year ended december 31 , 2020 , compared to the year ended december 31 , 2019. for a comparison of consolidated results for the year ended december 31 , 2019 compared to the year ended december 31 , 2018 , see part ii , item 7 “ management 's discussion and analysis of financial condition and results of operations ” in our annual report on form 10-k for the fiscal year ended december 31 , 2019 . 56 rental income . the decrease in rental income reflects decreases in rental income of $ 74,411 as a result of property disposition activities , $ 10,078 related to comparable properties and $ 6,204 related to a property undergoing significant redevelopment that became vacant in september 2019 , offset by an increase in rental income of $ 208 related to acquired properties . the decrease in rental income for comparable properties is primarily due to reductions in occupied space at certain of our properties in 2020 , certain below market lease intangibles becoming fully amortized , termination fee revenue totaling $ 1,543 recorded at certain of our comparable properties in 2019 , reductions in reimbursement income due to reductions in expenses that are reimbursable to us by our tenants as a result of the covid-19 pandemic and resulting decrease in space utilization , and decreased parking revenue at certain of our comparable properties due to lower parking activity resulting from the covid-19 pandemic . rental income includes non-cash straight line rent adjustments totaling $ 16,079 in 2020 and $ 27,507 in 2019 , and amortization of acquired leases and assumed lease obligations totaling ( $ 5,440 ) in 2020 and ( $ 2,710 ) in 2019. real estate taxes . the decrease in real estate taxes reflects a decrease in real estate taxes of $ 7,765 as a result of property disposition activities , a decrease of $ 803 for a property undergoing significant redevelopment and a decrease of $ 80 for comparable properties , offset by increases in real estate taxes of $ 50 for acquired properties . real estate taxes for comparable properties declined primarily due to the effect of lower real estate tax valuation assessments resulting from successful real estate tax appeals at certain of our properties since january 1 , 2019. utility expenses . the decrease in utility expenses reflects a decrease in utility expenses of $ 4,796 as a result of property disposition activities and a decrease in utility expenses for comparable properties of $ 4,188 , offset by an increase in utility expenses for a property undergoing significant redevelopment of $ 66. utility expenses for comparable properties declined primarily due to a decrease in electricity and water usage resulting from cost savings initiatives implemented by our manager , rmr llc , in response to decreased space utilization at our properties as a result of the covid-19 pandemic , as well as the implementation of real time energy management programs at certain of our properties in 2020. other operating expenses . other operating expenses consist of salaries and benefit costs of property level personnel , repairs and maintenance expense , cleaning expense , other direct costs of operating our properties and property management fees . the decrease in other operating expenses reflects a decrease of $ 13,448 as a result of property disposition activities , a decrease of $ 1,720 for comparable properties and a decrease of $ 436 related to a property undergoing significant redevelopment , offset by an increase in other operating expenses related to acquired properties of $ 126. other operating expenses for comparable properties declined primarily due to lower net cleaning costs resulting from cost savings initiatives implemented by our manager , rmr llc , in response to decreased space utilization at our properties as a result of the covid-19 pandemic , which were partially offset by an increase in cleaning costs related to more frequent cleaning and sanitizing practices at our properties to help mitigate the spread of covid-19 , lower snow removal costs and lower parking garage maintenance costs due to lower parking activity at certain of our properties resulting from the covid-19 pandemic , partially offset by higher insurance costs in 2020. depreciation and amortization . the decrease in depreciation and amortization primarily reflects a decrease of $ 23,092 as a result of property disposition activities , a decrease for comparable properties of $ 12,891 and a decrease related to a property undergoing significant redevelopment of $ 2,567 , offset by an increase related to acquired properties of $ 231. depreciation and amortization for comparable properties and the property undergoing significant redevelopment declined due to certain leasing related assets becoming fully depreciated in 2020 , partially offset by depreciation and amortization of improvements made to certain of our properties during 2019 and 2020. loss on impairment of real estate . we recorded a $ 2,954 loss on impairment of real estate in 2020 to reduce the carrying value of four properties to their estimated fair value less costs to sell . we recorded a $ 22,255 loss on impairment of real estate

