What was the percentage change in accrued expenses between 2018 and 2019?
{"Accrued property and real estate taxes": {"December 31, 2019": 198.1, "December 31, 2018": 169.7}, "Accrued pass-through costs": {"December 31, 2019": 74.2, "December 31, 2018": 71.2}, "Amounts payable to tenants": {"December 31, 2019": 77.9, "December 31, 2018": 93.5}, "Accrued rent": {"December 31, 2019": 75.6, "December 31, 2018": 61.4}, "Payroll and related withholdings": {"December 31, 2019": 102.4, "December 31, 2018": 90.4}, "Accrued construction costs": {"December 31, 2019": 27.8, "December 31, 2018": 41.5}, "Accrued income tax payable": {"December 31, 2019": 55.2, "December 31, 2018": 57.9}, "Other accrued expenses": {"December 31, 2019": 347.0, "December 31, 2018": 362.7}, "Accrued expenses": {"December 31, 2019": 958.2, "December 31, 2018": 948.3}}
accrued_expenses_2019 = df["Accrued expenses"]["December 31, 2019"]
accrued_expenses_2018 = df["Accrued expenses"]["December 31, 2018"]
answer = (accrued_expenses_2019 - accrued_expenses_2018) / accrued_expenses_2018 * 100.0