pre_text: Performance-Based Restricted Stock Units PRSU activity is summarized as follows (shares in thousands): 1 Assumes maximum achievement of the specified financial targets. The weighted-average grant date fair value of PRSUs granted during the years ended December 31, 2019, 2018, and 2017 was $56.74, $40.53, and $41.73, respectively. Unrecognized compensation expense related to unvested PRSUs was $16.9 million at December 31, 2019, which is expected to be recognized over a weighted-average period of 1.7 years.
table: Number of Shares Weighted- Average Grant Date Fair Value
table: Unvested shares at December 31, 2018 1,924 $40.81
table: Granted 390 56.74
table: Forfeited (562) 41.29
table: Vested — —
table: Unvested shares at December 31, 2019 1 1,752 $44.21
question: Analyse this data from a financial earnings document. What is the sum of number of unvested shares in 2018 and number of granted shares?