What was the percentage change in total vessel operating and supervision costs from 2018 to 2019?
{"Crew wages and vessel management employee costs": {"2017": 72652, "2018": 79624, "2019": 80713}, "Technical maintenance expenses": {"2017": 28736, "2018": 28694, "2019": 37653}, "Other vessel operating expenses": {"2017": 21098, "2018": 19766, "2019": 21296}, "Total": {"2017": 122486, "2018": 128084, "2019": 139662}}
total_2019 = df["Total"]["2019"]
total_2018 = df["Total"]["2018"]
answer = ( total_2019 - total_2018 ) / total_2018 * 100.0