pre_text: The following table summarizes information regarding restricted shares/RSUs granted and vested (in thousands, except per restricted share/RSU amounts): As of December 31, 2019, based on the probability of achieving the performance goals, there was $6.1 million of total unrecognized compensation cost, net of actual forfeitures, related to nonvested restricted shares/RSUs. Of the unrecognized compensation cost, 33% related to performance-based nonvested restricted shares/RSUs and 67% related to employment-based nonvested restricted shares/RSUs. This cost is expected to be recognized over a weighted average period of 2.0 years.
table: Years Ended December 31,
table: 2019 2018 2017
table: Number of restricted shares/ RSUs granted 508 492 480
table: Weighted average grant-date fair value per restricted share/RSU $28.43 $28.16 $29.42
table: Fair value of restricted shares/RSUs vested $3,647 $8,342 $6,868
question: Analyse this data from a financial earnings document. What was the change in Number of restricted shares/ RSUs granted in 2019 from 2018?