What was the percentage change in total income between 2018 and 2019?
{"Domestic (U.S.) (1)": {"2019": 95639, "2018": 141582, "2017": -67}, "Foreign (Outside U.S.) (1)": {"2019": 74792, "2018": 45485, "2017": 9875}, "Total (1)": {"2019": 170431, "2018": 187067, "2017": 9808}}
total_income_2019 = df["Total (1)"]["2019"]
total_income_2018 = df["Total (1)"]["2018"]
answer = ( total_income_2019 - total_income_2018 ) / total_income_2018 * 100.0