What is the percentage change in total net pool performance from 2018 to 2019?
{"Amounts in thousands of U.S. Dollars -- Pool gross revenues (included in Revenues)": {"2018": 102253, "2019": 45253}, "Amounts in thousands of U.S. Dollars -- Pool gross voyage expenses and commissions (included in Voyage expenses and commissions)": {"2018": -10154, "2019": -8086}, "Amounts in thousands of U.S. Dollars -- GasLogs adjustment for net pool allocation (included in Net pool allocation)": {"2018": 17818, "2019": -4264}, "Amounts in thousands of U.S. Dollars -- GasLogs total net pool performance": {"2018": 109917, "2019": 32903}}
total_2019 = df["Amounts in thousands of U.S. Dollars -- GasLogs total net pool performance"]["2019"]
total_2018 = df["Amounts in thousands of U.S. Dollars -- GasLogs total net pool performance"]["2018"]
answer = (total_2019 - total_2018) / total_2018 * 100.0