n o t e s t o t h e c o n s o l i d a t e d f i n a n c i a l s t a t e m e n t s 2013 ( continued ) ace limited and subsidiaries the weighted-average remaining contractual term was 5.7 years for the stock options outstanding and 4.3 years for the stock options exercisable at december 31 , 2010 . the total intrinsic value was $ 184 million for stock options outstanding and $ 124 million for stock options exercisable at december 31 , 2010 . the weighted-average fair value for the stock options granted for the years ended december 31 , 2010 , 2009 , and 2008 , was $ 12.09 , $ 12.95 , and $ 17.60 , respectively . the total intrinsic value for stock options exercised during the years ended december 31 , 2010 , 2009 , and 2008 , was $ 22 million , $ 12 mil- lion , and $ 54 million , respectively . the amount of cash received during the year ended december 31 , 2010 , from the exercise of stock options was $ 53 million . restricted stock and restricted stock units the company 2019s 2004 ltip provides for grants of restricted stock and restricted stock units with a 4-year vesting period , based on a graded vesting schedule . the company also grants restricted stock awards to non-management directors which vest at the following year 2019s annual general meeting . the restricted stock is granted at market close price on the date of grant . each restricted stock unit represents the company 2019s obligation to deliver to the holder one common share upon vesting . included in the company 2019s share-based compensation expense for the year ended december 31 , 2010 , is a portion of the cost related to the unvested restricted stock granted in the years 2006 2013 2010 . the following table presents a roll-forward of the company 2019s restricted stock for the years ended december 31 , 2010 , 2009 , and 2008 . included in the roll-forward below are 36248 and 38154 restricted stock awards that were granted to non-management directors during 2010 and 2009 , respectively . number of restricted stock weighted-average grant-date fair .
what is the net change in the number of unvested restricted stock in 2008?
during 2010 , the company awarded 326091 restricted stock units to officers of the company and its subsidiaries with a weighted-average grant date fair value of $ 50.36 . during 2009 , 333104 restricted stock units , with a weighted-average grant date fair value of $ 38.75 , were awarded to officers of the company and its subsidiaries . during 2008 , 223588 restricted stock units , with a weighted-average grant date fair value of $ 59.93 , were awarded to officers of the company and its subsidiaries . at december 31 , 2010 , the number of unvested restricted stock units was 636758 . prior to 2009 , the company granted restricted stock units with a 1-year vesting period to non-management directors . delivery of common shares on account of these restricted stock units to non-management directors is deferred until six months after the date of the non-management directors 2019 termination from the board . during 2008 , 40362 restricted stock units were awarded to non-management directors . at december 31 , 2010 , the number of deferred restricted stock units was 230451 . the espp gives participating employees the right to purchase common shares through payroll deductions during consecutive 201csubscription periods 201d at a purchase price of 85 percent of the fair value of a common share on the exercise date . annual purchases by participants are limited to the number of whole shares that can be purchased by an amount equal to ten percent .