What is the percentage change in goodwill from 2018 to 2019?
{"Opening balance": {"2019": 13783, "2018": 8469}, "Additions": {"2019": 157121, "2018": 6215}, "Acquisition adjustments": {"2019": "\u2014", "2018": -901}, "Effect of currency translation adjustment": {"2019": 305, "2018": "\u2014"}, "Goodwill": {"2019": 171209, "2018": 13783}}
goodwill_2019 = df["Goodwill"]["2019"]
opening_balance_2019 = df["Opening balance"]["2019"]
answer = (goodwill_2019 - opening_balance_2019) / opening_balance_2019 * 100.0