notes to consolidated financial statements 2014 ( continued ) the risk-free interest rate is based on the yield of a zero coupon united states treasury security with a maturity equal to the expected life of the option from the date of the grant .
our assumption on expected volatility is based on our historical volatility .
the dividend yield assumption is calculated using our average stock price over the preceding year and the annualized amount of our current quarterly dividend .
we based our assumptions on the expected lives of the options on our analysis of the historical exercise patterns of the options and our assumption on the future exercise pattern of options .
restricted stock shares awarded under the restricted stock program , issued under the 2000 plan and 2005 plan , are held in escrow and released to the grantee upon the grantee 2019s satisfaction of conditions of the grantee 2019s restricted stock agreement .
the grant date fair value of restricted stock awards is based on the quoted fair market value of our common stock at the award date .
compensation expense is recognized ratably during the escrow period of the award .
grants of restricted shares are subject to forfeiture if a grantee , among other conditions , leaves our employment prior to expiration of the restricted period .
grants of restricted shares generally 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 following table summarizes the changes in non-vested restricted stock awards for the years ended may 31 , 2010 and 2009 ( share awards in thousands ) : shares weighted average grant-date fair value .

Shares
Weighted Average  Grant-Date  Fair Value
Non-vested at May 31, 2008
518
$39
Granted
430
43
Vested
(159)
39
Forfeited
(27)
41
Non-vested at May 31, 2009
762
42
Granted
420
42
Vested
(302)
41
Forfeited
(167)
43
Non-vested at May 31, 2010
713
42

the weighted average grant-date fair value of share awards granted in the year ended may 31 , 2008 was $ 38 .
the total fair value of share awards vested during the years ended may 31 , 2010 , 2009 and 2008 was $ 12.4 million , $ 6.2 million and $ 4.1 million , respectively .
we recognized compensation expense for restricted stock of $ 12.1 million , $ 9.0 million , and $ 5.7 million in the years ended may 31 , 2010 , 2009 and 2008 .
as of may 31 , 2010 , there was $ 21.1 million of total unrecognized compensation cost related to unvested restricted stock awards that is expected to be recognized over a weighted average period of 2.5 years .
employee stock purchase plan we have an employee stock purchase plan under which the sale of 2.4 million shares of our common stock has been authorized .
employees may designate up to the lesser of $ 25000 or 20% ( 20 % ) of their annual compensation for the purchase of stock .
the price for shares purchased under the plan is 85% ( 85 % ) of the market value on the last day of the quarterly purchase period .
as of may 31 , 2010 , 0.9 million shares had been issued under this plan , with 1.5 million shares reserved for future issuance. .

Question: Analyse this data from a financial earnings document. in 2009 what was the percentage change in the non-vested at may 31 2009
Choices:
126392
244
471042.47104
2.12295
0.47104
Correct choice index: 4