pre_text: grants of restricted awards are subject to forfeiture if a grantee , among other conditions , leaves our employment prior to expiration of the restricted period . new grants of restricted awards generally vest one year after the date of grant in 25% ( 25 % ) increments over a four year period , with the exception of tsrs which vest after a three year period . the following table summarizes the changes in non-vested restricted stock awards for the years ended may 31 , 2013 and 2012 ( share awards in thousands ) : shares weighted average grant-date fair value .
post_text: the total fair value of share awards vested during the years ended may 31 , 2013 , 2012 and 2011 was $ 13.6 million , $ 12.9 million and $ 10.8 million , respectively . we recognized compensation expense for restricted stock of $ 16.2 million , $ 13.6 million , and $ 12.5 million in the years ended may 31 , 2013 , 2012 and 2011 , respectively . as of may 31 , 2013 , there was $ 33.5 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 , 2013 , 1.0 million shares had been issued under this plan , with 1.4 million shares reserved for future issuance . we recognized compensation expense for the plan of $ 0.5 million in the years ended may 31 , 2013 , 2012 and 2011 . the weighted average grant-date fair value of each designated share purchased under this plan during the years ended may 31 , 2013 , 2012 and 2011 was $ 6 , $ 7 and $ 6 , respectively , which represents the fair value of the 15% ( 15 % ) discount . 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 in 25% ( 25 % ) increments over a four year period . the plans provide for accelerated vesting under certain conditions . there were no options granted under the plans during the years ended may 31 , 2013 and may 31 , 2012. .
table: Shares Weighted AverageGrant-DateFair Value
table: Non-vested at May 31, 2011 869 $40
table: Granted 472 48
table: Vested (321) 40
table: Forfeited (79) 43
table: Non-vested at May 31, 2012 941 44
table: Granted 561 44
table: Vested (315) 43
table: Forfeited (91) 44
table: Non-vested at May 31, 2013 1,096 $44
question: Analyse this data from a financial earnings document. what was the average unrecognized compensation cost related to unvested restricted stock per year?