What was the percentage change in restricted cash between 2017 and 2018?
{"Cash and cash equivalents": {"2019": 195760, "2018": 303390, "2017": 224614}, "Restricted cash": {"2019": 250081, "2018": 155109, "2017": 129224}, "Cash and cash equivalents and restricted cash in Consolidated Statements of Cash Flows": {"2019": 445841, "2018": 458499, "2017": 353838}}
restricted_cash_2018 = df["Restricted cash"]["2018"]
restricted_cash_2017 = df["Restricted cash"]["2017"]
answer = ( restricted_cash_2018 - restricted_cash_2017 ) / restricted_cash_2017 * 100.0