we also monitor free cash flow , the dividend coverage ratio , financial leverage ( net debt divided by adjusted oibda plus integration and other encumbered theater payments ) , cash balances and revolving credit facility availability to ensure debt covenant compliance and that there is adequate cash availability to fund our working capital needs and debt obligations and current and future dividends declared by our board of directors . summary historical and operating data you should read this information in conjunction with the other information contained in this document , and our audited historical financial statements and the notes thereto included elsewhere in this document . the prior year balances have been adjusted to reflect the adoption of a change in accounting principle in the first quarter of 2018. refer to note 1 to the audited consolidated financial statements for discussion of the nature and impact of the change on the results of operations data for years ended december 28 , 2017 and december 29 , 2016. our operating data —the following table presents operating data and adjusted oibda ( dollars in millions , except share and margin data ) . refer to “ item 6. selected financial data—notes to the selected historical financial and operating data ” for a discussion of the calculation of adjusted oibda and reconciliation to operating income . replace_table_token_7_th nm = not meaningful . ( 1 ) represents the total attendance within ncm llc 's advertising network , excluding screens and attendance associated with certain amc rave , amc carmike and cinemark rave theaters that are currently part of another cinema advertising network for all periods presented . refer to note 5 to the audited consolidated financial statements included elsewhere in this document . our network —the net screens added to our network by the founding members and network affiliates during 2018 were as follows . 32 replace_table_token_8_th ( 1 ) represents six new affiliates added to our network during 2018. on december 31 , 2018 one of our affiliates did not renew their contract resulting in a reduction of 244 affiliate screens to our network . we believe that adding screens and attendees to our network will provide our advertising clients with a better marketing product with increased reach and improved geographic coverage . we also believe that the continued growth of our market coverage could strengthen our selling proposition and competitive positioning against other national , regional and local video advertising platforms , including television , online and mobile video platforms and other out of home video advertising platforms . basis of presentation prior to the completion of the ipo , ncm llc was wholly-owned by its founding members . in connection with the offering , ncm , inc. purchased newly issued common membership units from ncm llc and common membership units from ncm llc 's founding members and became a member of and the sole manager of ncm llc . we entered into several agreements to effect the reorganization and the financing transaction and certain amendments were made to the existing esas to govern the relationships among ncm llc and ncm llc 's founding members after the completion of these transactions . the results of operations data discussed herein were derived from the audited consolidated financial statements and accounting records of ncm , inc. and should be read in conjunction with the notes thereto . we have a 52-week or 53-week fiscal year ending on the first thursday after december 25. fiscal years 2016 , 2017 and 2018 contained 52 weeks . our 2019 fiscal year will contain 52 weeks . throughout this document , we refer to our fiscal years as set forth below : reference in fiscal year ended this document december 27 , 2018 2018 december 28 , 2017 2017 december 29 , 2016 2016 results of operations fiscal years 2018 and 2017 revenue . total revenue increased $ 15.3 million , or 3.6 % , from $ 426.1 million for 2017 to $ 441.4 million for 2018 . the following is a summary of revenue by category ( in millions ) : replace_table_token_9_th the following table shows data on revenue per attendee for 2018 and 2017 : 33 replace_table_token_10_th ( 1 ) represents the total attendance within ncm llc 's advertising network , excluding screens and attendance associated with certain amc rave , amc carmike and cinemark rave theaters for all periods presented . refer to note 5 to the audited consolidated financial statements included elsewhere in this document . national advertising revenue . the $ 15.7 million , or 5.3 % , increase in national advertising revenue ( excluding beverage revenue from the founding members ) was due primarily to a 2.2 % increase in national advertising cpms ( excluding beverage ) and a 3.0 % increase in impressions sold . the increase in impressions sold was primarily related to a 7.5 % increase in network attendance , partially offset by a decrease in national inventory utilization , from 118.5 % in 2017 to 113.5 % in 2018. inventory utilization is calculated as utilized impressions divided by total advertising impressions , which is based on eleven 30-second salable national advertising units in our noovie pre-show , which can be expanded , should market demand dictate . the increase in national advertising cpms was due primarily to an increase in scatter market demand , which is inventory not included within an upfront or content partner commitment sold closer to the advertisement air date , typically at higher cpms . this increase was partially offset by a decrease in content partner revenue in 2018 , compared to 2017. local and regional advertising revenue . story_separator_special_tag in 2017. these decreases to administrative and other costs were partially offset by a $ 1.8 million early lease termination charge recorded in 2017 for our corporate headquarters ( the payment of which was reimbursed by the new landlord ) . depreciation and amortization . depreciation and amortization expense increased $ 1.8 million , or 5.0 % , from $ 35.8 million for 2016 to $ 37.6 million for 2017. the increase was due to an increase in depreciation expense primarily from more software being placed into service in 2017 , compared to 2016 and an acceleration in depreciation expense on the leasehold improvements of our corporate headquarters location following the early termination of our lease . non-operating ( income ) expenses . total non-operating expenses decreased $ 205.0 million , or 319.8 % , from $ 64.1 million in non-operating expense for 2016 to $ 140.9 million in non-operating income for 2017 . the following table shows the changes in non-operating ( income ) expense for 2017 and 2016 ( in millions ) : replace_table_token_16_th nm = not meaningful . 38 the decrease in non-operating expense was due primarily to an increase in the gain on the re-measurement of the payable to the founding members under the tra of $ 193.4 million in 2017 , the absence of a $ 10.4 million loss on the early retirement of debt recorded in 2016 for the redemption of the senior unsecured notes and a $ 1.2 million decrease in interest on borrowings primarily related to a one-month period in 2016 between the issuance and redemption of notes , whereby interest was paid on both notes . the gain on the re-measurement of the payable to the founding members was due primarily to the tax act and the resulting reduction of the u.s. federal corporate tax rate from 35 % to 21 % which resulted in the re-measurement of our payable to the founding members under the tra at the lower tax rate . income tax expense . income tax expense increased $ 165.9 million from $ 14.4 million in 2016 to $ 180.3 million in 2017. the increase in income tax expense was primarily due to the tax act and the resulting reduction of the u.s. federal corporate tax rate from 35 % to 21 % , which decreased our net deferred tax assets and increased the corresponding deferred tax expense by $ 164.8 million during 2017. net income . net income increased $ 25.4 million from $ 32.9 million for 2016 to $ 58.3 million for 2017. the increase in net income was due to a $ 205.0 million decrease in non-operating expense and a $ 5.4 million decrease in income attributable to noncontrolling interests , partially offset by a $ 165.9 million increase in income tax expense , as described above , and a $ 19.1 million decrease in operating income . known trends and uncertainties beverage revenue —under the esas , up to 90 seconds of the noovie pre-show program can be sold to the founding members to satisfy their on-screen advertising commitments under their beverage concessionaire agreements . for the years ended 2018 and 2017 , two of the founding members purchased 60 seconds of on-screen advertising time and one founding member purchased 30 seconds to satisfy their obligations under their beverage concessionaire agreements . the founding members ' current long-term contracts with their beverage suppliers require the 30 or 60 seconds of beverage advertising , although such commitments could change in the future . per the esas , the time sold to the founding member beverage supplier is priced equal to the advertising cpm for the previous year charged by ncm llc to unaffiliated third parties during segment one ( closest to showtime ) of the noovie pre-show , limited to the highest advertising cpm being then-charged by ncm llc , which in 2018 increased 0.7 % . thus , the cpm on our beverage concessionaire revenue in 2019 will increase by 0.7 % compared to 2018. theater access fees —in consideration for ncm llc 's access to the founding members ' theater attendees for on-screen advertising and use of lobbies and other space within the founding members ' theaters for the len and lobby promotions , the founding members receive a monthly theater access fee under the esas . the theater access fee is composed of a fixed payment per patron and a fixed payment per digital screen ( connected to the dcn ) . the payment per theater patron increases by 8 % every five years , with the next increase occurring in fiscal year 2022. pursuant to the esas , the payment per digital screen increases annually by 5 % . the impact of the tax reform — on december 22 , 2017 , the u.s. government enacted comprehensive tax legislation commonly referred to as the tax cuts and jobs act . the tax act made broad and complex changes to the u.s. tax code that affected our fiscal year ending december 27 , 2018 , including , but not limited to , ( 1 ) reducing the u.s. federal corporate tax rate , ( 2 ) creating full expensing of qualified property , ( 3 ) creating a new limitation on deductible interest expense ; ( 4 ) changing rules related to uses and limitations of net operating loss carryforwards created in tax years beginning after december 31 , 2017 , and ( 5 ) limiting the amount of compensation that can be deducted for highly compensated officers by terminating the exclusion of performance-based compensation from the $ 1 million per employee , per year limitation . we expect the most significant impact of the tax act to be an annual reduction of the payments made to the founding members under the tra of approximately $ 8.0 to $ 10.0 million beginning with the payment for the year ending december 27 , 2018 which will be made in 2019. this estimate is

liquidity our cash balances can fluctuate due to the seasonality of our business and related timing of collections of accounts receivable balances and operating expenditure payments , as well as , available cash payments ( as defined in the ncm llc operating agreement ) to cinemark and regal , interest or principal payments on our term loan and the notes due 2022 and notes due 2026 , income tax payments , tra payments to the founding members and amount of quarterly dividends to ncm , inc. 's common stockholders . a summary of our financial liquidity is as follows ( in millions ) : 39 replace_table_token_17_th ( 1 ) included in cash and cash equivalents as of december 27 , 2018 , december 28 , 2017 and december 29 , 2016 there was $ 7.2 million , $ 4.6 million and $ 10.7 million , respectively , of cash held by ncm llc which is not available to satisfy ncm , inc. 's dividend payments and other ncm , inc. obligations . ( 2 ) the revolving credit facility portion of ncm llc 's total borrowings is available , subject to certain conditions , for general corporate purposes of ncm llc in the ordinary course of business and for other transactions permitted under the senior secured credit facility , and a portion is available for letters of credit .


 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 our cash balances can fluctuate due to the seasonality of our business and related timing of collections of accounts receivable balances and operating expenditure payments , as well as , available cash payments ( as defined in the ncm llc operating agreement ) to cinemark and regal , interest or principal payments on our term loan and the notes due 2022 and notes due 2026 , income tax payments , tra payments to the founding members and amount of quarterly dividends to ncm , inc. 's common stockholders . a summary of our financial liquidity is as follows ( in millions ) : 39 replace_table_token_17_th ( 1 ) included in cash and cash equivalents as of december 27 , 2018 , december 28 , 2017 and december 29 , 2016 there was $ 7.2 million , $ 4.6 million and $ 10.7 million , respectively , of cash held by ncm llc which is not available to satisfy ncm , inc. 's dividend payments and other ncm , inc. obligations . ( 2 ) the revolving credit facility portion of ncm llc 's total borrowings is available , subject to certain conditions , for general corporate purposes of ncm llc in the ordinary course of business and for other transactions permitted under the senior secured credit facility , and a portion is available for letters of credit .
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 Suspicious Activity Report : we also monitor free cash flow , the dividend coverage ratio , financial leverage ( net debt divided by adjusted oibda plus integration and other encumbered theater payments ) , cash balances and revolving credit facility availability to ensure debt covenant compliance and that there is adequate cash availability to fund our working capital needs and debt obligations and current and future dividends declared by our board of directors . summary historical and operating data you should read this information in conjunction with the other information contained in this document , and our audited historical financial statements and the notes thereto included elsewhere in this document . the prior year balances have been adjusted to reflect the adoption of a change in accounting principle in the first quarter of 2018. refer to note 1 to the audited consolidated financial statements for discussion of the nature and impact of the change on the results of operations data for years ended december 28 , 2017 and december 29 , 2016. our operating data —the following table presents operating data and adjusted oibda ( dollars in millions , except share and margin data ) . refer to “ item 6. selected financial data—notes to the selected historical financial and operating data ” for a discussion of the calculation of adjusted oibda and reconciliation to operating income . replace_table_token_7_th nm = not meaningful . ( 1 ) represents the total attendance within ncm llc 's advertising network , excluding screens and attendance associated with certain amc rave , amc carmike and cinemark rave theaters that are currently part of another cinema advertising network for all periods presented . refer to note 5 to the audited consolidated financial statements included elsewhere in this document . our network —the net screens added to our network by the founding members and network affiliates during 2018 were as follows . 32 replace_table_token_8_th ( 1 ) represents six new affiliates added to our network during 2018. on december 31 , 2018 one of our affiliates did not renew their contract resulting in a reduction of 244 affiliate screens to our network . we believe that adding screens and attendees to our network will provide our advertising clients with a better marketing product with increased reach and improved geographic coverage . we also believe that the continued growth of our market coverage could strengthen our selling proposition and competitive positioning against other national , regional and local video advertising platforms , including television , online and mobile video platforms and other out of home video advertising platforms . basis of presentation prior to the completion of the ipo , ncm llc was wholly-owned by its founding members . in connection with the offering , ncm , inc. purchased newly issued common membership units from ncm llc and common membership units from ncm llc 's founding members and became a member of and the sole manager of ncm llc . we entered into several agreements to effect the reorganization and the financing transaction and certain amendments were made to the existing esas to govern the relationships among ncm llc and ncm llc 's founding members after the completion of these transactions . the results of operations data discussed herein were derived from the audited consolidated financial statements and accounting records of ncm , inc. and should be read in conjunction with the notes thereto . we have a 52-week or 53-week fiscal year ending on the first thursday after december 25. fiscal years 2016 , 2017 and 2018 contained 52 weeks . our 2019 fiscal year will contain 52 weeks . throughout this document , we refer to our fiscal years as set forth below : reference in fiscal year ended this document december 27 , 2018 2018 december 28 , 2017 2017 december 29 , 2016 2016 results of operations fiscal years 2018 and 2017 revenue . total revenue increased $ 15.3 million , or 3.6 % , from $ 426.1 million for 2017 to $ 441.4 million for 2018 . the following is a summary of revenue by category ( in millions ) : replace_table_token_9_th the following table shows data on revenue per attendee for 2018 and 2017 : 33 replace_table_token_10_th ( 1 ) represents the total attendance within ncm llc 's advertising network , excluding screens and attendance associated with certain amc rave , amc carmike and cinemark rave theaters for all periods presented . refer to note 5 to the audited consolidated financial statements included elsewhere in this document . national advertising revenue . the $ 15.7 million , or 5.3 % , increase in national advertising revenue ( excluding beverage revenue from the founding members ) was due primarily to a 2.2 % increase in national advertising cpms ( excluding beverage ) and a 3.0 % increase in impressions sold . the increase in impressions sold was primarily related to a 7.5 % increase in network attendance , partially offset by a decrease in national inventory utilization , from 118.5 % in 2017 to 113.5 % in 2018. inventory utilization is calculated as utilized impressions divided by total advertising impressions , which is based on eleven 30-second salable national advertising units in our noovie pre-show , which can be expanded , should market demand dictate . the increase in national advertising cpms was due primarily to an increase in scatter market demand , which is inventory not included within an upfront or content partner commitment sold closer to the advertisement air date , typically at higher cpms . this increase was partially offset by a decrease in content partner revenue in 2018 , compared to 2017. local and regional advertising revenue . story_separator_special_tag in 2017. these decreases to administrative and other costs were partially offset by a $ 1.8 million early lease termination charge recorded in 2017 for our corporate headquarters ( the payment of which was reimbursed by the new landlord ) . depreciation and amortization . depreciation and amortization expense increased $ 1.8 million , or 5.0 % , from $ 35.8 million for 2016 to $ 37.6 million for 2017. the increase was due to an increase in depreciation expense primarily from more software being placed into service in 2017 , compared to 2016 and an acceleration in depreciation expense on the leasehold improvements of our corporate headquarters location following the early termination of our lease . non-operating ( income ) expenses . total non-operating expenses decreased $ 205.0 million , or 319.8 % , from $ 64.1 million in non-operating expense for 2016 to $ 140.9 million in non-operating income for 2017 . the following table shows the changes in non-operating ( income ) expense for 2017 and 2016 ( in millions ) : replace_table_token_16_th nm = not meaningful . 38 the decrease in non-operating expense was due primarily to an increase in the gain on the re-measurement of the payable to the founding members under the tra of $ 193.4 million in 2017 , the absence of a $ 10.4 million loss on the early retirement of debt recorded in 2016 for the redemption of the senior unsecured notes and a $ 1.2 million decrease in interest on borrowings primarily related to a one-month period in 2016 between the issuance and redemption of notes , whereby interest was paid on both notes . the gain on the re-measurement of the payable to the founding members was due primarily to the tax act and the resulting reduction of the u.s. federal corporate tax rate from 35 % to 21 % which resulted in the re-measurement of our payable to the founding members under the tra at the lower tax rate . income tax expense . income tax expense increased $ 165.9 million from $ 14.4 million in 2016 to $ 180.3 million in 2017. the increase in income tax expense was primarily due to the tax act and the resulting reduction of the u.s. federal corporate tax rate from 35 % to 21 % , which decreased our net deferred tax assets and increased the corresponding deferred tax expense by $ 164.8 million during 2017. net income . net income increased $ 25.4 million from $ 32.9 million for 2016 to $ 58.3 million for 2017. the increase in net income was due to a $ 205.0 million decrease in non-operating expense and a $ 5.4 million decrease in income attributable to noncontrolling interests , partially offset by a $ 165.9 million increase in income tax expense , as described above , and a $ 19.1 million decrease in operating income . known trends and uncertainties beverage revenue —under the esas , up to 90 seconds of the noovie pre-show program can be sold to the founding members to satisfy their on-screen advertising commitments under their beverage concessionaire agreements . for the years ended 2018 and 2017 , two of the founding members purchased 60 seconds of on-screen advertising time and one founding member purchased 30 seconds to satisfy their obligations under their beverage concessionaire agreements . the founding members ' current long-term contracts with their beverage suppliers require the 30 or 60 seconds of beverage advertising , although such commitments could change in the future . per the esas , the time sold to the founding member beverage supplier is priced equal to the advertising cpm for the previous year charged by ncm llc to unaffiliated third parties during segment one ( closest to showtime ) of the noovie pre-show , limited to the highest advertising cpm being then-charged by ncm llc , which in 2018 increased 0.7 % . thus , the cpm on our beverage concessionaire revenue in 2019 will increase by 0.7 % compared to 2018. theater access fees —in consideration for ncm llc 's access to the founding members ' theater attendees for on-screen advertising and use of lobbies and other space within the founding members ' theaters for the len and lobby promotions , the founding members receive a monthly theater access fee under the esas . the theater access fee is composed of a fixed payment per patron and a fixed payment per digital screen ( connected to the dcn ) . the payment per theater patron increases by 8 % every five years , with the next increase occurring in fiscal year 2022. pursuant to the esas , the payment per digital screen increases annually by 5 % . the impact of the tax reform — on december 22 , 2017 , the u.s. government enacted comprehensive tax legislation commonly referred to as the tax cuts and jobs act . the tax act made broad and complex changes to the u.s. tax code that affected our fiscal year ending december 27 , 2018 , including , but not limited to , ( 1 ) reducing the u.s. federal corporate tax rate , ( 2 ) creating full expensing of qualified property , ( 3 ) creating a new limitation on deductible interest expense ; ( 4 ) changing rules related to uses and limitations of net operating loss carryforwards created in tax years beginning after december 31 , 2017 , and ( 5 ) limiting the amount of compensation that can be deducted for highly compensated officers by terminating the exclusion of performance-based compensation from the $ 1 million per employee , per year limitation . we expect the most significant impact of the tax act to be an annual reduction of the payments made to the founding members under the tra of approximately $ 8.0 to $ 10.0 million beginning with the payment for the year ending december 27 , 2018 which will be made in 2019. this estimate is

