What was the percentage change in net total property, plant and equipment between 2018 and 2019?
{"Land": {"2019": 4575, "2018": 4575}, "Building and land improvements": {"2019": 34797, "2018": 34379}, "Building": {"2019": 68157, "2018": 68183}, "Furniture and fixtures": {"2019": 19959, "2018": 19831}, "Computer hardware and software": {"2019": 74399, "2018": 92071}, "Engineering and other equipment": {"2019": 130430, "2018": 127060}, "Total Property, Plant and Equipment": {"2019": 332317, "2018": 346099}, "Less accumulated depreciation": {"2019": -258609, "2018": -265464}, "Total Property, Plant and Equipment, net": {"2019": 73708, "2018": 80635}}
net_total_2019 = df["Total Property, Plant and Equipment, net"]["2019"]
net_total_2018 = df["Total Property, Plant and Equipment, net"]["2018"]
answer = (net_total_2019 - net_total_2018) / net_total_2018 * 100.0