during fiscal 2013 , we entered into an asr with a financial institution to repurchase an aggregate of $ 125 million of our common stock .
in exchange for an up-front payment of $ 125 million , the financial institution committed to deliver a number of shares during the asr 2019s purchase period , which ended on march 30 , 2013 .
the total number of shares delivered under this asr was 2.5 million at an average price of $ 49.13 per share .
during fiscal 2013 , in addition to shares repurchased under the asr , we repurchased and retired 1.1 million shares of our common stock at a cost of $ 50.3 million , or an average of $ 44.55 per share , including commissions .
note 10 2014share-based awards and options 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 ) , the amended and restated 2000 non-employee director stock option plan ( the 201cdirector stock option plan 201d ) , and the global payments inc .
2011 incentive plan ( the 201c2011 plan 201d ) ( collectively , the 201cplans 201d ) .
there were no further grants made under the 2000 plan after the 2005 plan was effective , and the director stock option plan expired by its terms on february 1 , 2011 .
there will be no future grants under the 2000 plan , the 2005 plan or the director stock option the 2011 plan permits grants of equity to employees , officers , directors and consultants .
a total of 7.0 million shares of our common stock was reserved and made available for issuance pursuant to awards granted under the 2011 plan .
the following table summarizes share-based compensation expense and the related income tax benefit recognized for stock options , restricted stock , performance units , tsr units , and shares issued under our employee stock purchase plan ( each as described below ) .
2015 2014 2013 ( in millions ) .

2015
2014 (in millions)
2013
Share-based compensation expense
$21.1
$29.8
$18.4
Income tax benefit
$(6.9)
$(7.1)
$(5.6)

we grant various share-based awards pursuant to the plans under what we refer to as our 201clong-term incentive plan . 201d the awards are held in escrow and released upon the grantee 2019s satisfaction of conditions of the award certificate .
restricted stock and restricted stock units we grant restricted stock and restricted stock units .
restricted stock awards vest over a period of time , provided , however , that if the grantee is not employed by us on the vesting date , the shares are forfeited .
restricted shares cannot be sold or transferred until they have vested .
restricted stock granted before fiscal 2015 vests in equal installments on each of the first four anniversaries of the grant date .
restricted stock granted during fiscal 2015 will either vest in equal installments on each of the first three anniversaries of the grant date or cliff vest at the end of a three-year service period .
the grant date fair value of restricted stock , which is based on the quoted market value of our common stock at the closing of the award date , is recognized as share-based compensation expense on a straight-line basis over the vesting period .
performance units certain of our executives have been granted up to three types of performance units under our long-term incentive plan .
performance units are performance-based restricted stock units that , after a performance period , convert into common shares , which may be restricted .
the number of shares is dependent upon the achievement of certain performance measures during the performance period .
the target number of performance units and any market-based performance measures ( 201cat threshold , 201d 201ctarget , 201d and 201cmaximum 201d ) are set by the compensation committee of our board of directors .
performance units are converted only after the compensation committee certifies performance based on pre-established goals .
80 2013 global payments inc .
| 2015 form 10-k annual report .

Question: Analyse this data from a financial earnings document. what is the growth rate in the share-based compensation expense from 2014 to 2015?
Choices:
-0.04328
-0.29
-8.7
-30.09195
-0.29195
Correct choice index: 4