What was the percentage change in the the total remuneration to the auditor in 2019 from 2018?
{"Audit fees -- Fees payable to the Company's auditor for the audit of the Company's annual accounts": {"2019": 0.4, "2018": 0.4, "2017": 0.4}, "Audit fees -- Audit of the Company's subsidiaries pursuant to legislation": {"2019": 0.2, "2018": 0.2, "2017": 0.2}, "Audit fees -- Total audit fees": {"2019": 0.6, "2018": 0.6, "2017": 0.6}, "Non-audit fees -- Audit-related services": {"2019": 0.1, "2018": 0.2, "2017": 0.4}, "Non-audit fees -- Tax services": {"2019": 0.0, "2018": "-", "2017": "-"}, "Non-audit fees -- Total non-audit fees": {"2019": 0.1, "2018": 0.2, "2017": 0.4}, "Non-audit fees -- Total": {"2019": 0.7, "2018": 0.8, "2017": 1.0}}
total_2019 = df["Non-audit fees -- Total"]["2019"]
total_2018 = df["Non-audit fees -- Total"]["2018"]
answer = (total_2019 - total_2018) / total_2018 * 100.0