What is the Tax fees for fiscal year 2019 expressed as a percentage of total fees?
{"Audit fees (1)": {"2019": 4598, "2018": 4701}, "Audit-related fees (2)": {"2019": "\u2014", "2018": "\u2014"}, "Tax fees (3)": {"2019": 108, "2018": 116}, "All other fees (4)": {"2019": 40, "2018": 101}, "Total": {"2019": 4746, "2018": 4918}}
tax_fees_2019 = df["Tax fees (3)"]["2019"]
total_2019 = df["Total"]["2019"]
answer = tax_fees_2019 / total_2019 * 100.0