What was the change in equities from 2018 to 2019?
{"Assets -- Equities": {"30 March 2019": 179.5, "31 March 2018": 296.5}, "Assets -- Government bonds": {"30 March 2019": 1490.4, "31 March 2018": 1046.4}, "Assets -- Corporate bonds": {"30 March 2019": 26.9, "31 March 2018": 20.7}, "Assets -- Property": {"30 March 2019": 436.5, "31 March 2018": 391.0}, "Assets -- Absolute return products": {"30 March 2019": 1141.2, "31 March 2018": 1323.3}, "Assets -- Cash": {"30 March 2019": 38.1, "31 March 2018": 32.4}, "Assets -- Infrastructure funds": {"30 March 2019": 256.1, "31 March 2018": 254.6}, "Assets -- Swaps": {"30 March 2019": 556.4, "31 March 2018": 715.3}, "Assets -- Private equity": {"30 March 2019": 446.1, "31 March 2018": 344.0}, "Assets -- Other": {"30 March 2019": 469.5, "31 March 2018": 439.4}, "Assets -- Total Assets": {"30 March 2019": 5040.7, "31 March 2018": 4863.6}, "Liabilities -- Discount rate": {"30 March 2019": 2.45, "31 March 2018": 2.7}, "Liabilities -- Inflation rate (RPI/CPI)": {"30 March 2019": 3.25, "31 March 2018": 3.15}}
equities_2019 = df["Assets -- Equities"]["30 March 2019"]
equities_2018 = df["Assets -- Equities"]["31 March 2018"]
answer = equities_2019 - equities_2018