What was the change in Other in 2019 from 2018?
{"Profit before tax": {"2019": 4596.0, "2018": 5600.0, "2017": 5029.0}, "Tax expense at applicable tax rate of 26.4% rate of 26.4% (2018: 26.4%; 2017: 26.4%)": {"2019": 1212.0, "2018": 1478.0, "2017": 1327.0}, "Tax effect of: -- Foreign tax rates": {"2019": 209.0, "2018": 147.0, "2017": 403.0}, "Tax effect of: -- Changes in tax laws and tax rates": {"2019": 10.0, "2018": 0.0, "2017": 212.0}, "Tax effect of: -- Non-deductible expenses": {"2019": 116.0, "2018": 106.0, "2017": 82.0}, "Tax effect of: -- Tax-exempt income": {"2019": 93.0, "2018": 38.0, "2017": 95.0}, "Tax effect of: -- Withholding taxes": {"2019": 138.0, "2018": 91.0, "2017": 131.0}, "Tax effect of: -- Research and development and foreign tax credits": {"2019": 89.0, "2018": 33.0, "2017": 26.0}, "Tax effect of: -- Prior-year taxes": {"2019": 80.0, "2018": 17.0, "2017": 26.0}, "Tax effect of: -- Reassessment of deferred tax assets, research and development tax credits, and foreign tax credits": {"2019": 48.0, "2018": 58.0, "2017": 185.0}, "Tax effect of: -- Other": {"2019": 13.0, "2018": 13.0, "2017": 20.0}, "Tax effect of: -- Total income tax expense": {"2019": 1226.0, "2018": 1511.0, "2017": 983.0}, "Tax effect of: -- Effective tax rate (in %)": {"2019": 26.7, "2018": 27.0, "2017": 19.5}}
tax_effect_of__other_2019 = df["Tax effect of: -- Other"]["2019"]
tax_effect_of__other_2018 = df["Tax effect of: -- Other"]["2018"]
answer = tax_effect_of__other_2019 - tax_effect_of__other_2018