What is the total cash dividends paid for 2019 expressed as percentage of the total cash dividends paid for all years?
{"2017": {"Total Cash Dividends Paid": 119.7, "Total Cash Dividends Paid Per Common Share": 0.64}, "2018": {"Total Cash Dividends Paid": 102.9, "Total Cash Dividends Paid Per Common Share": 0.64}, "2019": {"Total Cash Dividends Paid": 99.1, "Total Cash Dividends Paid Per Common Share": 0.64}, "Total": {"Total Cash Dividends Paid": 321.7, "Total Cash Dividends Paid Per Common Share": ""}}
total_cash_dividends_paid_2019 = df["2019"]["Total Cash Dividends Paid"]
total_cash_dividends_paid_all_years = df["Total"]["Total Cash Dividends Paid"]
answer = total_cash_dividends_paid_2019 / total_cash_dividends_paid_all_years * 100.0