What was the percentage change in profit from 2017 to 2018?
{"Amounts are in thousands of U.S. Dollars -- Revenues": {"2017": 525229, "2018": 618344, "Change": 93115}, "Amounts are in thousands of U.S. Dollars -- Net pool allocation": {"2017": 7254, "2018": 17818, "Change": 10564}, "Amounts are in thousands of U.S. Dollars -- Voyage expenses and commissions": {"2017": -15404, "2018": -20374, "Change": -4970}, "Amounts are in thousands of U.S. Dollars -- Vessel operating and supervision costs": {"2017": -122486, "2018": -128084, "Change": -5598}, "Amounts are in thousands of U.S. Dollars -- Depreciation": {"2017": -137187, "2018": -153193, "Change": -16006}, "Amounts are in thousands of U.S. Dollars -- General and administrative expenses": {"2017": -39850, "2018": -41993, "Change": -2143}, "Amounts are in thousands of U.S. Dollars -- Profit from operations": {"2017": 217556, "2018": 292518, "Change": 74962}, "Amounts are in thousands of U.S. Dollars -- Financial costs": {"2017": -139181, "2018": -166627, "Change": -27446}, "Amounts are in thousands of U.S. Dollars -- Financial income": {"2017": 2650, "2018": 4784, "Change": 2134}, "Amounts are in thousands of U.S. Dollars -- Gain/(loss) on derivatives": {"2017": 2025, "2018": -6077, "Change": -8102}, "Amounts are in thousands of U.S. Dollars -- Share of profit of associates": {"2017": 1159, "2018": 1800, "Change": 641}, "Amounts are in thousands of U.S. Dollars -- Total other expenses, net": {"2017": -133347, "2018": -166120, "Change": -32773}, "Amounts are in thousands of U.S. Dollars -- Profit for the year": {"2017": 84209, "2018": 126398, "Change": 42189}, "Amounts are in thousands of U.S. Dollars -- Non-controlling interests": {"2017": 68703, "2018": 78715, "Change": 10012}, "Amounts are in thousands of U.S. Dollars -- Profit attributable to owners of the Group": {"2017": 15506, "2018": 47683, "Change": 32177}}
profit_2018 = df["Amounts are in thousands of U.S. Dollars -- Profit for the year"]["2018"]
profit_2017 = df["Amounts are in thousands of U.S. Dollars -- Profit for the year"]["2017"]
answer = (profit_2018 - profit_2017) / profit_2017 * 100.0