{"pre_text": ["to determine stock-based compensation expense , the grant date fair value is applied to the options granted with a reduction for estimated forfeitures .", "we recognize compensation expense for stock options on a straight-line basis over the specified vesting period .", "at december 31 , 2012 and 2011 , options for 12759000 and 12337000 shares of common stock were exercisable at a weighted-average price of $ 90.86 and $ 106.08 , respectively .", "the total intrinsic value of options exercised during 2013 , 2012 and 2011 was $ 86 million , $ 37 million and $ 4 million , respectively .", "the total tax benefit recognized related to compensation expense on all share-based payment arrangements during 2013 , 2012 and 2011 was approximately $ 56 million , $ 37 million and $ 38 million , respectively .", "cash received from option exercises under all incentive plans for 2013 , 2012 and 2011 was approximately $ 208 million , $ 118 million and $ 41 million , respectively .", "the tax benefit realized from option exercises under all incentive plans for 2013 , 2012 and 2011 was approximately $ 31 million , $ 14 million and $ 1 million , respectively .", "shares of common stock available during the next year for the granting of options and other awards under the incentive plans were 24535159 at december 31 , 2013 .", "total shares of pnc common stock authorized for future issuance under equity compensation plans totaled 25712719 shares at december 31 , 2013 , which includes shares available for issuance under the incentive plans and the employee stock purchase plan ( espp ) as described below .", "during 2013 , we issued approximately 2.6 million shares from treasury stock in connection with stock option exercise activity .", "as with past exercise activity , we currently intend to utilize primarily treasury stock for any future stock option exercises .", "awards granted to non-employee directors in 2013 , 2012 and 2011 include 27076 , 25620 and 27090 deferred stock units , respectively , awarded under the outside directors deferred stock unit plan .", "a deferred stock unit is a phantom share of our common stock , which is accounted for as a liability until such awards are paid to the participants in cash .", "as there are no vesting or service requirements on these awards , total compensation expense is recognized in full for these awards on the date of grant .", "incentive/performance unit share awards and restricted stock/share unit awards the fair value of nonvested incentive/performance unit share awards and restricted stock/share unit awards is initially determined based on prices not less than the market value of our common stock on the date of grant .", "the value of certain incentive/performance unit share awards is subsequently remeasured based on the achievement of one or more financial and other performance goals , generally over a three-year period .", "the personnel and compensation committee ( 201cp&cc 201d ) of the board of directors approves the final award payout with respect to certain incentive/performance unit share awards .", "restricted stock/share unit awards have various vesting periods generally ranging from 3 years to 5 years .", "beginning in 2013 , we incorporated several enhanced risk- related performance changes to certain long-term incentive compensation programs .", "in addition to achieving certain financial performance metrics on both an absolute basis and relative to our peers , final payout amounts will be subject to reduction if pnc fails to meet certain risk-related performance metrics as specified in the award agreement .", "however , the p&cc has the discretion to waive any or all of this reduction under certain circumstances .", "these awards have either a three- year or a four-year performance period and are payable in either stock or a combination of stock and cash .", "additionally , performance-based restricted share units were granted in 2013 to certain executives as part of annual bonus deferral criteria .", "these units , payable solely in stock , vest ratably over a four-year period and contain the same risk- related discretionary criteria noted in the preceding paragraph .", "the weighted-average grant date fair value of incentive/ performance unit share awards and restricted stock/unit awards granted in 2013 , 2012 and 2011 was $ 64.77 , $ 60.68 and $ 63.25 per share , respectively .", "the total fair value of incentive/performance unit share and restricted stock/unit awards vested during 2013 , 2012 and 2011 was approximately $ 63 million , $ 55 million and $ 52 million , respectively .", "we recognize compensation expense for such awards ratably over the corresponding vesting and/or performance periods for each type of program .", "table 124 : nonvested incentive/performance unit share awards and restricted stock/share unit awards 2013 rollforward shares in thousands nonvested incentive/ performance unit shares weighted- average grant date fair value nonvested restricted stock/ weighted- average grant date fair value ."], "post_text": ["the pnc financial services group , inc .", "2013 form 10-k 187 ."], "table": [["shares in thousands december 31 2012", "nonvested incentive/ performance unit shares 1119", "weighted- average grant date fair value $ 61.14", "nonvested restricted stock/ share units 3061", "weighted- average grant date fair value $ 60.04"], ["granted", "926", "64.36", "1288", "65.06"], ["vested/released", "-326 ( 326 )", "58.26", "-674 ( 674 )", "55.22"], ["forfeited", "-72 ( 72 )", "62.02", "-192 ( 192 )", "62.37"], ["december 31 2013", "1647", "$ 63.49", "3483", "$ 62.70"]], "table_ori": [["Shares in thousands", "Nonvested Incentive/ Performance Unit Shares", "Weighted- Average Grant Date Fair Value", "Nonvested Restricted Stock/ Share Units", "Weighted- Average Grant Date Fair Value"], ["December 31, 2012", "1,119", "$61.14", "3,061", "$60.04"], ["Granted", "926", "64.36", "1,288", "65.06"], ["Vested/Released", "(326)", "58.26", "(674)", "55.22"], ["Forfeited", "(72)", "62.02", "(192)", "62.37"], ["December 31, 2013", "1,647", "$63.49", "3,483", "$62.70"]]}

Question: for 2013 , what was the change in shares in thousands of nonvested incentive/ performance unit shares?
Evidence:
table_4: shares in thousands december 31 2012 the december 31 2013 of nonvested incentive/ performance unit shares 1119 is 1647 ; the december 31 2013 of weighted- average grant date fair value $ 61.14 is $ 63.49 ; the december 31 2013 of nonvested restricted stock/ share units 3061 is 3483 ; the december 31 2013 of weighted- average grant date fair value $ 60.04 is $ 62.70 ;
Program: subtract(1647, 1119)
Answer:
str_answer: 528
exe_answer: 528