pre_text: Stock Options Additional information related to our stock options is summarized below (in millions):
table: Year Ended
table: April 26, 2019 April 27, 2018 April 28, 2017
table: Intrinsic value of exercises $ 31 $ 37 $ 26
table: Proceeds received from exercises $ 25 $ 88 $ 60
table: Fair value of options vested $ 2 $ 8 $ 15
question: Analyse this data from a financial earnings document. What was the change in Intrinsic value of exercises between 2017 and 2018?