What is the percentage change of additions based on tax positions related to current year from 2018 to 2019?
{"Balance at beginning of year": {"2019": 41198, "2018": 29938, "2017": 35584}, "Reductions based on tax positions related to prior year": {"2019": -207, "2018": -820, "2017": -6335}, "Additions based on tax positions related to prior year": {"2019": 9562, "2018": 263, "2017": 108}, "Additions based on tax positions related to current year": {"2019": 16517, "2018": 11860, "2017": 9289}, "Reductions due to tax authorities settlements": {"2019": "\u2014", "2018": -43, "2017": -8603}, "Reductions due to expiration of statutes of limitation": {"2019": -45, "2018": "\u2014", "2017": -105}, "Balance at end of year": {"2019": 67025, "2018": 41198, "2017": 29938}}
additions_2019 = df["Additions based on tax positions related to current year"]["2019"]
additions_2018 = df["Additions based on tax positions related to current year"]["2018"]
answer = ( additions_2019 - additions_2018 ) / additions_2018 * 100.0