pre_text: AMERICAN TOWER CORPORATION AND SUBSIDIARIES NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Tabular amounts in millions, unless otherwise disclosed) 10. OTHER NON-CURRENT LIABILITIES Other non-current liabilities consisted of the following: The reduction in Deferred rent liability is a result of the Company’s adoption of the new lease accounting standard.
table: As of
table: December 31, 2019 December 31, 2018
table: Deferred rent liability $— $506.7
table: Unearned revenue 525.9 504.6
table: Other miscellaneous liabilities 411.1 253.8
table: Other non-current liabilities $937.0 $1,265.1
question: Analyse this data from a financial earnings document. What was the change in unearned revenue between 2018 and 2019?