special asset pool special asset pool ( sap ) , which constituted approximately 22% ( 22 % ) of citi holdings by assets as of december 31 , 2010 , is a portfolio of securities , loans and other assets that citigroup intends to actively reduce over time through asset sales and portfolio run-off .at december 31 , 2010 , sap had $ 80 billion of assets .sap assets have declined by $ 248 billion , or 76% ( 76 % ) , from peak levels in 2007 reflecting cumulative write-downs , asset sales and portfolio run-off .in millions of dollars 2010 2009 2008 % (  % ) change 2010 vs .2009 % (  % ) change 2009 vs .2008 .
[['in millions of dollars', '2010', '2009', '2008', '% (  % ) change 2010 vs . 2009', '% (  % ) change 2009 vs . 2008'], ['net interest revenue', '$ 1219', '$ 2754', '$ 2676', '( 56 ) % (  % )', '3% ( 3 % )'], ['non-interest revenue', '1633', '-6014 ( 6014 )', '-42375 ( 42375 )', 'nm', '86'], ['revenues net of interest expense', '$ 2852', '$ -3260 ( 3260 )', '$ -39699 ( 39699 )', 'nm', '92% ( 92 % )'], ['total operating expenses', '$ 548', '$ 824', '$ 893', '( 33 ) % (  % )', '( 8 ) % (  % )'], ['net credit losses', '$ 2013', '$ 5399', '$ 906', '( 63 ) % (  % )', 'nm'], ['provision ( releases ) for unfunded lending commitments', '-76 ( 76 )', '111', '-172 ( 172 )', 'nm', 'nm'], ['credit reserve builds ( releases )', '-1711 ( 1711 )', '-530 ( 530 )', '2677', 'nm', 'nm'], ['provisions for credit losses and for benefits and claims', '$ 226', '$ 4980', '$ 3411', '( 95 ) % (  % )', '46% ( 46 % )'], ['income ( loss ) from continuing operations before taxes', '$ 2078', '$ -9064 ( 9064 )', '$ -44003 ( 44003 )', 'nm', '79% ( 79 % )'], ['income taxes ( benefits )', '905', '-3695 ( 3695 )', '-16714 ( 16714 )', 'nm', '78'], ['net income ( loss ) from continuing operations', '$ 1173', '$ -5369 ( 5369 )', '$ -27289 ( 27289 )', 'nm', '80% ( 80 % )'], ['net income ( loss ) attributable to noncontrolling interests', '188', '-16 ( 16 )', '-205 ( 205 )', 'nm', '92'], ['net income ( loss )', '$ 985', '$ -5353 ( 5353 )', '$ -27084 ( 27084 )', 'nm', '80% ( 80 % )'], ['eop assets ( in billions of dollars )', '$ 80', '$ 136', '$ 219', '( 41 ) % (  % )', '( 38 ) % (  % )']]
nm not meaningful 2010 vs .2009 revenues , net of interest expense increased $ 6.1 billion , primarily due to the improvement of revenue marks in 2010 .aggregate marks were negative $ 2.6 billion in 2009 as compared to positive marks of $ 3.4 billion in 2010 ( see 201citems impacting sap revenues 201d below ) .revenue in the current year included positive marks of $ 2.0 billion related to sub-prime related direct exposure , a positive $ 0.5 billion cva related to the monoline insurers , and $ 0.4 billion on private equity positions .these positive marks were partially offset by negative revenues of $ 0.5 billion on alt-a mortgages and $ 0.4 billion on commercial real estate .operating expenses decreased 33% ( 33 % ) in 2010 , mainly driven by the absence of the u.s .government loss-sharing agreement , lower compensation , and lower transaction expenses .provisions for credit losses and for benefits and claims decreased $ 4.8 billion due to a decrease in net credit losses of $ 3.4 billion and a higher release of loan loss reserves and unfunded lending commitments of $ 1.4 billion .assets declined 41% ( 41 % ) from the prior year , primarily driven by sales and amortization and prepayments .asset sales of $ 39 billion for the year of 2010 generated pretax gains of approximately $ 1.3 billion .2009 vs .2008 revenues , net of interest expense increased $ 36.4 billion in 2009 , primarily due to the absence of significant negative revenue marks occurring in the prior year .total negative marks were $ 2.6 billion in 2009 as compared to $ 37.4 billion in 2008 .revenue in 2009 included positive marks of $ 0.8 billion on subprime-related direct exposures .these positive revenues were partially offset by negative revenues of $ 1.5 billion on alt-a mortgages , $ 0.8 billion of write-downs on commercial real estate , and a negative $ 1.6 billion cva on the monoline insurers and fair value option liabilities .revenue was also affected by negative marks on private equity positions and write-downs on highly leveraged finance commitments .operating expenses decreased 8% ( 8 % ) in 2009 , mainly driven by lower compensation and lower volumes and transaction expenses , partially offset by costs associated with the u.s .government loss-sharing agreement exited in the fourth quarter of 2009 .provisions for credit losses and for benefits and claims increased $ 1.6 billion , primarily driven by $ 4.5 billion in increased net credit losses , partially offset by a lower provision for loan losses and unfunded lending commitments of $ 2.9 billion .assets declined 38% ( 38 % ) versus the prior year , primarily driven by amortization and prepayments , sales , marks and charge-offs. .

Question: what percentage of revenue net of interest expense is due to non-interest revenue in 2010?
Answer: 57%