What is the change in the applicable statutory tax rate from 2018 to 2019?
{"Net earnings": {"2019": 3253.0, "2018": 2973.0}, "Add back income taxes": {"2019": 1133.0, "2018": 995.0}, "Earnings before income taxes": {"2019": 4386.0, "2018": 3968.0}, "Applicable statutory tax rate": {"2019": 27.0, "2018": 27.0}, "Income taxes computed at applicable statutory rates": {"2019": -1184.0, "2018": -1071.0}, "Non-taxable portion of gains (losses) on investments": {"2019": 4.0, "2018": -9.0}, "Uncertain tax positions": {"2019": 15.0, "2018": 68.0}, "Effect of change in provincial corporate tax rate": {"2019": 27.0, "2018": "\u2013"}, "Change in estimate relating to prior periods": {"2019": 14.0, "2018": 20.0}, "Non-taxable portion of equity losses": {"2019": -20.0, "2018": -10.0}, "Previously unrecognized tax benefits": {"2019": 9.0, "2018": "\u2013"}, "Other": {"2019": 2.0, "2018": 7.0}, "Total income taxes": {"2019": -1133.0, "2018": -995.0}, "Average effective tax rate": {"2019": 25.8, "2018": 25.1}}
statutory_tax_rate_2019 = df["Applicable statutory tax rate"]["2019"]
statutory_tax_rate_2018 = df["Applicable statutory tax rate"]["2018"]
answer = statutory_tax_rate_2019 - statutory_tax_rate_2018