What was the percentage change between other non-current liabilities between 2018 and 2019?
{"Deferred rent liability": {"December 31, 2019": "$\u2014", "December 31, 2018": 506.7}, "Unearned revenue": {"December 31, 2019": 525.9, "December 31, 2018": 504.6}, "Other miscellaneous liabilities": {"December 31, 2019": 411.1, "December 31, 2018": 253.8}, "Other non-current liabilities": {"December 31, 2019": 937.0, "December 31, 2018": 1265.1}}
other_noncurrent_liabilities_2019 = df["Other non-current liabilities"]["December 31, 2019"]
other_noncurrent_liabilities_2018 = df["Other non-current liabilities"]["December 31, 2018"]
answer = ( other_noncurrent_liabilities_2019 - other_noncurrent_liabilities_2018 ) / other_noncurrent_liabilities_2018 * 100.0