What is the increase/ (decrease) in Income tax expense (recovery) from Year Ended December 31, 2019 to December 31, 2018?
{"Reconciliation of EBITDA and Adjusted EBITDA to Net (loss) income -- Net (loss) income": {"2019": -148986, "2018": -57747, "2017": -529072, "2016": 86664, "2015": 405460}, "Reconciliation of EBITDA and Adjusted EBITDA to Net (loss) income -- Income tax expense (recovery)": {"2019": 25482, "2018": 19724, "2017": 12232, "2016": 24468, "2015": -16767}, "Reconciliation of EBITDA and Adjusted EBITDA to Net (loss) income -- Depreciation and amortization": {"2019": 290672, "2018": 276307, "2017": 485829, "2016": 571825, "2015": 509500}, "Reconciliation of EBITDA and Adjusted EBITDA to Net (loss) income -- Interest expense, net of interest income": {"2019": 271255, "2018": 245601, "2017": 262110, "2016": 278145, "2015": 236481}, "Reconciliation of EBITDA and Adjusted EBITDA to Net (loss) income -- EBITDA": {"2019": 438423, "2018": 483885, "2017": 231099, "2016": 961102, "2015": 1134674}, "Reconciliation of EBITDA and Adjusted EBITDA to Net (loss) income -- Foreign exchange loss (gain) (a)": {"2019": 13574, "2018": -6140, "2017": 26463, "2016": 6548, "2015": 2195}, "Reconciliation of EBITDA and Adjusted EBITDA to Net (loss) income -- Other loss (income) (b) (c)": {"2019": 14475, "2018": 2013, "2017": 53981, "2016": 39013, "2015": -1566}, "Reconciliation of EBITDA and Adjusted EBITDA to Net (loss) income -- Write-down and loss on sale of vessels": {"2019": 170310, "2018": 53693, "2017": 270743, "2016": 112246, "2015": 70175}, "Reconciliation of EBITDA and Adjusted EBITDA to Net (loss) income -- Direct finance lease payments received in excess of revenue recognized": {"2019": 21636, "2018": 11082, "2017": 18737, "2016": 28348, "2015": 24429}, "Reconciliation of EBITDA and Adjusted EBITDA to Net (loss) income -- Amortization of in-process revenue contracts and other": {"2019": -4131, "2018": -10217, "2017": -13460, "2016": -24195, "2015": -33226}, "Reconciliation of EBITDA and Adjusted EBITDA to Net (loss) income -- Realized and unrealized losses on non-designated derivative instruments": {"2019": 13719, "2018": 14852, "2017": 38854, "2016": 35091, "2015": 102200}, "Reconciliation of EBITDA and Adjusted EBITDA to Net (loss) income -- Realized gains (losses) from the settlements of nondesignated derivative instruments": {"2019": 1532, "2018": "\u2014", "2017": 2047, "2016": -8646, "2015": -20008}, "Reconciliation of EBITDA and Adjusted EBITDA to Net (loss) income -- Loss on deconsolidation of Altera": {"2019": "\u2014", "2018": 7070, "2017": 104788, "2016": "\u2014", "2015": "\u2014"}, "Reconciliation of EBITDA and Adjusted EBITDA to Net (loss) income -- Adjustments related to equity (loss) income (d)": {"2019": 282375, "2018": 219395, "2017": 217866, "2016": 137496, "2015": 136921}, "Reconciliation of EBITDA and Adjusted EBITDA to Net (loss) income -- Adjusted EBITDA": {"2019": 951913, "2018": 775633, "2017": 951118, "2016": 1287003, "2015": 1415794}}
income_tax_expense_recovery_2019 = df["Reconciliation of EBITDA and Adjusted EBITDA to Net (loss) income -- Income tax expense (recovery)"]["2019"]
income_tax_expense_recovery_2018 = df["Reconciliation of EBITDA and Adjusted EBITDA to Net (loss) income -- Income tax expense (recovery)"]["2018"]
answer = income_tax_expense_recovery_2019 - income_tax_expense_recovery_2018