What was the percentage change in the Capital assets in progress between 2018 and 2019?
{"Land, buildings and improvements": {"2019": 289051, "2018": 267809}, "Machinery and equipment": {"2019": 381656, "2018": 364034}, "Computer hardware and software": {"2019": 136227, "2018": 130645}, "Capital assets in progress": {"2019": 49599, "2018": 38469}, "Total property, plant and equipment, gross ": {"2019": 856533, "2018": 800957}, "Less: accumulated depreciation ": {"2019": -472309, "2018": -459651}, "Total property, plant and equipment, net": {"2019": 384224, "2018": 341306}}
capital_assets_in_progress_2019 = df["Capital assets in progress"]["2019"]
capital_assets_in_progress_2018 = df["Capital assets in progress"]["2018"]
answer = ( capital_assets_in_progress_2019 - capital_assets_in_progress_2018 ) / capital_assets_in_progress_2018 * 100.0