34 – Expenses Group auditor Index333435363738 Expenses for services rendered by the Group auditor (including the international network in terms of section 271b UGB) comprised the following: (XLSX:) Download Expenses for services rendered by the Group auditor (including the international network) In EUR mn 2021 2020 Group auditor thereof Ernst&Young Wirtschaftsprüfungsgesellschaft m.b.H Group auditor thereof Ernst&Young Wirtschaftsprüfungsgesellschaft m.b.H Audit of Group accounts and year-end audit 3.55 1.51 3.57 1.64 Other assurance services 0.53 0.31 0.89 0.56 Tax advisory services 0.56 — 0.10 — Other services 0.07 0.01 1.15 — Total 4.70 1.84 5.70 2.20 33 – Average number of employees35 – Related parties