What is the percentage change in gross unrecognized tax benefits at the beginning of the year from 2018 to 2019?
{"Gross unrecognized tax benefits at the beginning of the year": {"2019": 1321, "2018": 1181, "2017": "$\u2014"}, "Additions from tax positions taken in the current year": {"2019": 213, "2018": 140, "2017": 140}, "Additions from tax positions taken in prior years": {"2019": 73, "2018": "\u2014", "2017": 1041}, "Reductions from tax positions taken in prior years": {"2019": "\u2014", "2018": "\u2014", "2017": "\u2014"}, "Tax settlements": {"2019": "\u2014", "2018": "\u2014", "2017": "\u2014"}, "Gross unrecognized tax benefits at end of the year": {"2019": 1607, "2018": 1321, "2017": 1181}}
gross_unrecognized_tax_benefits_2019 = df["Gross unrecognized tax benefits at the beginning of the year"]["2019"]
gross_unrecognized_tax_benefits_2018 = df["Gross unrecognized tax benefits at the beginning of the year"]["2018"]
answer = (gross_unrecognized_tax_benefits_2019 - gross_unrecognized_tax_benefits_2018) / gross_unrecognized_tax_benefits_2018 * 100.0