What is the percentage change in the audit-related assurance services from 2018 to 2019?
{"": {"2019": 0, "2018": 0}, "Fees payable to the Companys auditor and its associates for: -- The audit of the Companys annual financial statements": {"2019": 559, "2018": 382}, "Fees payable to the Companys auditor and its associates for: -- The audit of the Companys subsidiaries": {"2019": 533, "2018": 441}, "Fees payable to the Companys auditor and its associates for: -- Fees related to the audit of the Company and its subsidiaries": {"2019": 1092, "2018": 823}, "Fees payable to the Companys auditor and its associates for: -- Audit-related assurance services1": {"2019": 64, "2018": 51}, "Fees payable to the Companys auditor and its associates for: -- Total fees for audit and audit-related services": {"2019": 1156, "2018": 874}, "Fees payable to the Companys auditor and its associates for: -- Other non-audit assurance services2": {"2019": 534, "2018": 230}, "Fees payable to the Companys auditor and its associates for: -- Total fees": {"2019": 1690, "2018": 1104}}
audit_assurance_services_2019 = df["Fees payable to the Companys auditor and its associates for: -- Audit-related assurance services1"]["2019"]
audit_assurance_services_2018 = df["Fees payable to the Companys auditor and its associates for: -- Audit-related assurance services1"]["2018"]
answer = (audit_assurance_services_2019 - audit_assurance_services_2018) / audit_assurance_services_2018 * 100.0