What was the percentage change in TCE earnings in 2019 from 2018?
{"Reconciliation to revenue -- Revenue": {"2019": 692.6, "2018": 635.4, "2017": 657.0}, "Reconciliation to revenue -- Port expenses, bunkers and commissions": {"2019": -267.7, "2018": -283.0, "2017": -259.9}, "Reconciliation to revenue -- TCE earnings": {"2019": 424.9, "2018": 352.4, "2017": 397.1}}
tce_earnings_2019 = df["Reconciliation to revenue -- TCE earnings"]["2019"]
tce_earnings_2018 = df["Reconciliation to revenue -- TCE earnings"]["2018"]
answer = (tce_earnings_2019 - tce_earnings_2018) / tce_earnings_2018 * 100.0