pre_text: INCOME TAX EXPENSE Below is a summary of the difference between income tax expense computed by applying the statutory income tax rate to income before income tax expense and the actual income tax expense for the year. Our effective income tax rate this year was 25.8% compared to 26.9% for 2018. The effective income tax rate for 2019 was lower than the statutory tax rate primarily as a result of a reduction to the Alberta corporate income tax rate over a four-year period.
table: (In millions of dollars, except tax rates) Years ended December 31
table: 2019 2018 %Chg
table: Adjusted EBITDA 1 6,212 5,983 4
table: Deduct (add):
table: Depreciation and amortization 2,488 2,211 13
table: Gain on disposition of property, plant and equipment - (16) (100)
table: Restructuring, acquisition and other 139 210 (34)
table: Finance costs 840 793 6
table: Other income (10) (32) (69)
table: Income tax expense 712 758 (6)
table: Net income 2,043 2,059 (1)
question: Analyse this data from a financial earnings document. What was the increase / (decrease) in Adjusted EBITDA from 2018 to 2019?