What was the change in the revenue from Asia Pacific between 2017 and 2018?
{"United States, Canada and Latin America (Americas)": {"April 26, 2019": 3425, "April 27, 2018": 3207, "April 28, 2017": 3021}, "Europe, Middle East and Africa (EMEA)": {"April 26, 2019": 1847, "April 27, 2018": 1873, "April 28, 2017": 1741}, "Asia Pacific (APAC)": {"April 26, 2019": 874, "April 27, 2018": 839, "April 28, 2017": 729}, "Net revenues": {"April 26, 2019": 6146, "April 27, 2018": 5919, "April 28, 2017": 5491}}
apac_revenue_2018 = df["Asia Pacific (APAC)"]["April 27, 2018"]
apac_revenue_2017 = df["Asia Pacific (APAC)"]["April 28, 2017"]
answer = apac_revenue_2018 - apac_revenue_2017