What was the percentage change in the total cash, cash equivalents and restricted cash between 2019 and 2020?
{"Cash and cash equivalents": {"January 31, 2020": 2915, "February 1, 2019": 3532}, "Restricted cash within other current assets": {"January 31, 2020": 83, "February 1, 2019": 35}, "Restricted cash within other assets": {"January 31, 2020": 33, "February 1, 2019": 29}, "Total cash, cash equivalents and restricted cash": {"January 31, 2020": 3031, "February 1, 2019": 3596}}
total_cash_2020 = df["Total cash, cash equivalents and restricted cash"]["January 31, 2020"]
total_cash_2019 = df["Total cash, cash equivalents and restricted cash"]["February 1, 2019"]
answer = (total_cash_2020 - total_cash_2019) / total_cash_2019 * 100.0