What was the percentage change in Ending balance in 2019 from 2018?
{"Beginning balance": {"2019": 4568, "2018": 6890, "2017": 2420}, "Additions charged to expenses": {"2019": 5210, "2018": 1980, "2017": 4190}, "Accruals related to acquisitions": {"2019": "\u2014", "2018": 37, "2017": 4390}, "Deductions from reserves": {"2019": -1088, "2018": -4339, "2017": -4110}, "Ending balance": {"2019": 8690, "2018": 4568, "2017": 6890}}
ending_balance_2019 = df["Ending balance"]["2019"]
beginning_balance_2019 = df["Beginning balance"]["2019"]
answer = ( ending_balance_2019 - beginning_balance_2019 ) / beginning_balance_2019 * 100.0