What is the change of “All Other Fees” from 2017 to 2018?
{"": {"2017": "(In Thousands)", "2018": "(In Thousands)"}, "Audit Fees (1)": {"2017": 3747, "2018": 4476}, "Audit-Related Fees (2)": {"2017": "\u2014", "2018": "\u2014"}, "Tax Fees (3)": {"2017": "\u2014", "2018": "\u2014"}, "All Other Fees (4)": {"2017": 3, "2018": 3}, "Total Fees": {"2017": 3750, "2018": 4479}}
all_other_fees_4_2017 = df["All Other Fees (4)"]["2017"]
all_other_fees_4_2018 = df["All Other Fees (4)"]["2018"]
answer = all_other_fees_4_2018 - all_other_fees_4_2017