pre_text: (19) Income Taxes As of December 31, 2019 and 2018, the components of deferred tax assets primarily relate to equity method investments, equity-based compensation, deferred revenues, interest rate swaps, employee benefits accruals and deferred compensation. As of December 31, 2019 and 2018, the components of deferred tax liabilities primarily relate to depreciation and amortization of intangible assets, property and equipment and deferred contract costs. The significant components of deferred tax assets and liabilities consist of the following (in millions):
table: December 31,
table: 2019 2018
table: Deferred tax assets:
table: Equity method investments $25.7 $—
table: Equity-based compensation 12.6 9.2
table: Deferred revenues 6.2 14.8
table: Interest rate swaps 5.6 —
table: Other 13.0 11.4
table: Total deferred tax assets 63.1 35.4
table: Deferred tax liabilities:
table: Goodwill and other intangibles (168.7) (178.9)
table: Deferred contract costs (40.3) (41.9)
table: Property, equipment and computer software (34.3) (28.0)
table: Other (5.1) (7.5)
table: Total deferred tax liabilities (248.4) (256.3)
table: Net deferred tax liability $(185.3) $(220.9)
question: Analyse this data from a financial earnings document. What was the change in equity-based compensation between 2018 and 2019?