What was the change in Cash provided by operating activities between 2018 and 2019?
{"Cash and cash equivalents and investments": {"Fiscal 2019": 33413, "Fiscal 2018": 46548}, "Cash provided by operating activities": {"Fiscal 2019": 15831, "Fiscal 2018": 13666}, "Deferred revenue (1)": {"Fiscal 2019": 18467, "Fiscal 2018": 19685}, "Repurchases of common stockstock repurchase program": {"Fiscal 2019": 20577, "Fiscal 2018": 17661}, "Dividends": {"Fiscal 2019": 5979, "Fiscal 2018": 5968}, "Inventories": {"Fiscal 2019": 1383, "Fiscal 2018": 1846}}
cash_2019 = df["Cash provided by operating activities"]["Fiscal 2019"]
cash_2018 = df["Cash provided by operating activities"]["Fiscal 2018"]
answer = cash_2019 - cash_2018