{"pre_text": ["the table below summarizes activity of rsus with performance conditions for the year ended december 31 , shares ( in thousands ) weighted average grant date fair value ( per share ) ."], "post_text": ["as of december 31 , 2017 , $ 6 million of total unrecognized compensation cost related to the nonvested rsus , with and without performance conditions , is expected to be recognized over the weighted-average remaining life of 1.5 years .", "the total fair value of rsus , with and without performance conditions , vested was $ 16 million , $ 14 million and $ 12 million for the years ended december 31 , 2017 , 2016 and 2015 , respectively .", "if dividends are paid with respect to shares of the company 2019s common stock before the rsus are distributed , the company credits a liability for the value of the dividends that would have been paid if the rsus were shares of company common stock .", "when the rsus are distributed , the company pays the participant a lump sum cash payment equal to the value of the dividend equivalents accrued .", "the company accrued dividend equivalents totaling less than $ 1 million , $ 1 million and $ 1 million to accumulated deficit in the accompanying consolidated statements of changes in stockholders 2019 equity for the years ended december 31 , 2017 , 2016 and 2015 , respectively .", "employee stock purchase plan the company maintains a nonqualified employee stock purchase plan ( the 201cespp 201d ) through which employee participants may use payroll deductions to acquire company common stock at the lesser of 90% ( 90 % ) of the fair market value of the common stock at either the beginning or the end of a three-month purchase period .", "on february 15 , 2017 , the board adopted the american water works company , inc .", "and its designated subsidiaries 2017 nonqualified employee stock purchase plan , which was approved by stockholders on may 12 , 2017 and took effect on august 5 , 2017 .", "the prior plan was terminated as to new purchases of company stock effective august 31 , 2017 .", "as of december 31 , 2017 , there were 2.0 million shares of common stock reserved for issuance under the espp .", "the espp is considered compensatory .", "during the years ended december 31 , 2017 , 2016 and 2015 , the company issued 93 thousand , 93 thousand and 98 thousand shares , respectively , under the espp. ."], "table": [["", "shares ( in thousands )", "weightedaverage grantdate fair value ( per share )"], ["non-vested total as of december 31 2016", "309", "$ 55.94"], ["granted", "186", "63.10"], ["vested", "-204 ( 204 )", "46.10"], ["forfeited", "-10 ( 10 )", "70.50"], ["non-vested total as of december 31 2017", "281", "$ 67.33"]], "table_ori": [["", "Shares(In thousands)", "WeightedAverage GrantDate Fair Value(Per share)"], ["Non-vested total as of December 31, 2016", "309", "$55.94"], ["Granted", "186", "63.10"], ["Vested", "(204)", "46.10"], ["Forfeited", "(10)", "70.50"], ["Non-vested total as of December 31, 2017", "281", "$67.33"]]}

Question: by how much did non-vested rsu's decrease from 2016 to 2017?
Evidence:
table_1: the non-vested total as of december 31 2016 of shares ( in thousands ) is 309 ; the non-vested total as of december 31 2016 of weightedaverage grantdate fair value ( per share ) is $ 55.94 ;
table_5: the non-vested total as of december 31 2017 of shares ( in thousands ) is 281 ; the non-vested total as of december 31 2017 of weightedaverage grantdate fair value ( per share ) is $ 67.33 ;
Program: subtract(281, 309), divide(#0, 309)
Answer:
str_answer: -9.1%
exe_answer: -0.09061