pre_text: be resolved , we cannot reasonably determine the probability of an adverse claim or reasonably estimate any adverse liability or the total maximum exposure under these indemnification arrangements . we do not have any reason to believe that we will be required to make any material payments under these indemnity provisions . income taxes 2013 as discussed in note 4 , the irs has completed its examinations and issued notices of deficiency for tax years 1995 through 2004 , and we are in different stages of the irs appeals process for these years . the irs is examining our tax returns for tax years 2005 and 2006 . in the third quarter of 2007 , we believe that we reached an agreement in principle with the irs to resolve all of the issues , except interest , related to tax years 1995 through 1998 , including the previously reported dispute over certain donations of property . we anticipate signing a closing agreement in 2008 . at december 31 , 2007 , we have recorded a current liability of $ 140 million for tax payments in 2008 related to federal and state income tax examinations . we do not expect that the ultimate resolution of these examinations will have a material adverse effect on our consolidated financial statements . 11 . other income other income included the following for the years ended december 31 : millions of dollars 2007 2006 2005 .
post_text: 12 . share repurchase program on january 30 , 2007 , our board of directors authorized the repurchase of up to 20 million shares of union pacific corporation common stock through the end of 2009 . management 2019s assessments of market conditions and other pertinent facts guide the timing and volume of all repurchases . we expect to fund our common stock repurchases through cash generated from operations , the sale or lease of various operating and non- operating properties , debt issuances , and cash on hand at december 31 , 2007 . during 2007 , we repurchased approximately 13 million shares under this program at an aggregate purchase price of approximately $ 1.5 billion . these shares were recorded in treasury stock at cost , which includes any applicable commissions and fees. .
table: <i>Millions of Dollars</i> 2007 2006 2005
table: Rental income $ 68 $ 83 $ 59
table: Net gain on non-operating asset dispositions 52 72 135
table: Interest income 50 29 17
table: Sale of receivables fees (35) (33) (23)
table: Non-operating environmental costs and other (19) (33) (43)
table: Total $ 116 $ 118 $ 145
question: Analyse this data from a financial earnings document. what percent of total other income was rental income in 2007?