What was the percentage change in the amount of total dividends paid in 2019 from 2018?
{"": {"2019": "\u00a3m", "2018": "\u00a3m"}, "Amounts paid in the year: -- Final dividend for the year ended 31st December 2018 of 71.0p (2017: 62.0p) per share": {"2019": 52.3, "2018": 45.7}, "Amounts paid in the year: -- Interim dividend for the year ended 31st December 2019 of 32.0p (2018: 29.0p) per share": {"2019": 23.6, "2018": 21.3}, "Amounts paid in the year: -- Total dividends paid": {"2019": 75.9, "2018": 67.0}, "Amounts arising in respect of the year: -- Interim dividend for the year ended 31st December 2019 of 32.0p (2018: 29.0p) per share": {"2019": 23.6, "2018": 21.3}, "Amounts arising in respect of the year: -- Proposed final dividend for the year ended 31st December 2019 of 78.0p (2018: 71.0p) per share": {"2019": 57.5, "2018": 52.3}, "Amounts arising in respect of the year: -- Total dividends arising": {"2019": 81.1, "2018": 73.6}}
total_dividends_2019 = df["Amounts paid in the year: -- Total dividends paid"]["2019"]
total_dividends_2018 = df["Amounts paid in the year: -- Total dividends paid"]["2018"]
answer = (total_dividends_2019 - total_dividends_2018) / total_dividends_2018 * 100.0