What was the percentage change in total assets between 2018 and 2019?
{"Total assets -- EMS": {"August 31, 2019": 4353465, "August 31, 2018": 3456866}, "Total assets -- DMS": {"August 31, 2019": 4988198, "August 31, 2018": 5378436}, "Total assets -- Other non-allocated assets": {"August 31, 2019": 3628812, "August 31, 2018": 3210339}, "Total assets -- ": {"August 31, 2019": 12970475, "August 31, 2018": 12045641}}
total_assets_2019 = df["Total assets -- "]["August 31, 2019"]
total_assets_2018 = df["Total assets -- "]["August 31, 2018"]
answer = (total_assets_2019 - total_assets_2018) / total_assets_2018 * 100.0