What was the percentage change in Pension expenses in 2019 from 2018?
{"Salaries": {"2019": 10031, "2018": 9025, "2017": 8693}, "Social security expenses": {"2019": 1477, "2018": 1339, "2017": 1281}, "Share-based payment expenses": {"2019": 1835, "2018": 830, "2017": 1120}, "Pension expenses": {"2019": 369, "2018": 330, "2017": 312}, "Employee-related restructuring expenses": {"2019": 1111, "2018": 19, "2017": 180}, "Termination benefits outside of restructuring plans": {"2019": 47, "2018": 52, "2017": 57}, "Employee benefits expenses": {"2019": 14870, "2018": 11595, "2017": 11643}}
pension_expenses_2019 = df["Pension expenses"]["2019"]
pension_expenses_2018 = df["Pension expenses"]["2018"]
answer = ( pension_expenses_2019 - pension_expenses_2018 ) / pension_expenses_2018 * 100.0