pre_text: Restricted Stock Units The Company grants restricted stock units, or RSUs, to employees with various vesting terms. RSUs entitle the holder to receive, at no cost, one common share for each restricted stock unit on the vesting date as it vests. The Company withholds shares in settlement of employee tax withholding obligations upon the vesting of restricted stock units. Stock-based compensation related to grants of vested RSUs and PSUs was $3.0 million, $1.6, million and $1.0 million in 2019, 2018 and 2017, respectively. The following table summarizes RSU’s activity under the 2019 Plan and 2009 Plan, and the related weighted average grant date fair value, for 2019, 2018 and 2017:
table: RSUs & PRSUs Outstanding
table: Number of Shares Weighted Average Grant Date Fair Value
table: (in thousands)
table: Nonvested at January 1, 2017 98 $23.52
table: Granted 132 19.74
table: Vested (43) 20.44
table: Forfeited (19) —
table: Nonvested at January 1, 2018 168 21.56
table: Granted 110 11.90
table: Vested (77) 19.18
table: Forfeited (18) —
table: Nonvested at December 30, 2018 183 17.22
table: Granted 353 10.77
table: Vested (118) 14.48
table: Forfeited (41) —
table: Nonvested at December 29, 2019 377 $12.55
question: Analyse this data from a financial earnings document. What is the average number of nonvested shares granted on January 1, 2017 and between December 30, 2018 and December 29, 2019?