What was the change in the profit for the period attributable to equity holders as reported under IFRS in 2019 from 2018?
{"Profit for the period attributable to equity holders as reported under IFRS (m)": {"2019": 166.6, "2018": 223.1}, "Items excluded from adjusted operating profit disclosed above (m)": {"2019": 37.7, "2018": -34.2}, "Tax effects on adjusted items (m)": {"2019": -8.5, "2018": -5.0}, "Adjusted profit for the period attributable to equity holders (m)": {"2019": 195.8, "2018": 183.9}, "Weighted average shares (million)": {"2019": 73.7, "2018": 73.6}, "Basic adjusted earnings per share": {"2019": 265.7, "2018": 250.0}, "Diluted weighted average shares (million)": {"2019": 73.9, "2018": 73.8}, "Diluted adjusted earnings per share": {"2019": 264.9, "2018": 249.1}}
profit_2019 = df["Profit for the period attributable to equity holders as reported under IFRS (m)"]["2019"]
profit_2018 = df["Profit for the period attributable to equity holders as reported under IFRS (m)"]["2018"]
answer = profit_2019 - profit_2018