stock options stock options are granted at 100% ( 100 % ) of fair market value on the date of grant and have 10-year terms . stock options granted vest one year after the date of grant with respect to 25% ( 25 % ) of the shares granted , an additional 25% ( 25 % ) after two years , an additional 25% ( 25 % ) after three years , and the remaining 25% ( 25 % ) after four years . the plans provide for accelerated vesting under certain conditions . we have historically issued new shares to satisfy the exercise of options. .
notes to consolidated financial statements 2014 ( continued ) note 10 2014shareholders 2019 equity on april 23 , 2010 , our board of directors approved a share repurchase program that authorized the purchase of up to $ 100.0 million of global payments 2019 stock in the open market or as otherwise may be determined by us , subject to market conditions , business opportunities , and other factors . under this authorization , we repurchased 2382890 shares of our common stock at a cost of $ 100.0 million , or an average of $ 41.97 per share , including commissions . repurchased shares are held as treasury stock . in addition , we have $ 13.0 million remaining under the authorization from our original share repurchase program initiated during fiscal 2007 . these repurchased shares were retired and are available for future issuance . we did not repurchase shares under this plan in fiscal 2010 . this authorization has no expiration date and may be suspended or terminated at any time . note 11 2014share-based awards and options as of may 31 , 2010 , we have four share-based employee compensation plans . for all share-based awards granted after june 1 , 2006 , compensation expense is recognized on a straight-line basis . the fair value of share- based awards granted prior to june 1 , 2006 is amortized as compensation expense on an accelerated basis from the date of the grant . non-qualified stock options and restricted stock have been granted to officers , key employees and directors under the global payments inc . 2000 long-term incentive plan , as amended and restated ( the 201c2000 plan 201d ) , the global payments inc . amended and restated 2005 incentive plan ( the 201c2005 plan 201d ) , and an amended and restated 2000 non-employee director stock option plan ( the 201cdirector plan 201d ) ( collectively , the 201cplans 201d ) . effective with the adoption of the 2005 plan , there are no future grants under the 2000 plan . shares available for future grant as of may 31 , 2010 are 2.7 million for the 2005 plan and 0.4 million for the director plan . certain executives are also granted performance-based restricted stock units ( 201crsu 201ds ) . rsus represent the right to earn shares of global stock if certain performance measures are achieved during the grant year . the target number of rsus and target performance measures are set by our compensation committee . rsus are converted to a stock grant only if the company 2019s performance during the fiscal year exceeds pre-established goals the following table summarizes the share-based compensation cost charged to income for ( i ) all stock options granted , ( ii ) our employee stock purchase plan , and ( iii ) our restricted stock program . the total income tax benefit recognized for share-based compensation in the accompanying statements of income is also presented. .
in 2010 what was the percent of the income tax benefit to the stock based compensation cost
the share-based compensation cost of 2010 is $ 18.1 ; the share-based compensation cost of 2009 is $ 14.6 ; the share-based compensation cost of 2008 is $ 13.8 ; the income tax benefit of 2010 is $ -6.3 ( 6.3 ) ; the income tax benefit of 2009 is $ -5.2 ( 5.2 ) ; the income tax benefit of 2008 is $ -4.9 ( 4.9 ) ;
2010 2009 2008
share-based compensation cost $ 18.1 $ 14.6 $ 13.8
income tax benefit $ -6.3 ( 6.3 ) $ -5.2 ( 5.2 ) $ -4.9 ( 4.9 )