20. Administrative expenses

Administrative expenses by type 1 January - 31 December 2015 1 January - 31 December 2014
Consumption of materials and energy 56,344 36,708
External services 315,616 233,534
Taxes and charges 30,131 51,335
Employee expenses 804,479 775,232
Depreciation of property, plant and equipment 53,014 50,869
Amortization of intangible assets 46,273 38,365
Remuneration of people handling group insurance with companies 212,388 209,376
Other (by type), including: 139,633 132,280
- advertisement 78,999 88,941
- other 60,634 43,339
Total administrative expenses 1,657,878 1,527,699

Administrative expenses also include costs of insurance activity, not classified as acquisition expenses, related to premium collection, management of the portfolio of insurance contracts, reinsurance contracts and other related to the operations of the insurance companies of PZU Group as specified in their By-laws.