| EUR 1 000 | 2018 | 2017 |
| Maintenance services | 29 760 | 21 024 |
| Regional maintenance and service | 8 744 | 9 329 |
| Research services | 3 927 | 4 300 |
| Other external services | 28 384 | 24 227 |
| Real estate tax | 6 134 | 4 828 |
| Rents | 946 | 1 204 |
| ICT expenses | 4 090 | 3 936 |
| Personnel related expenses | 4 863 | 4 265 |
| Corporate communication expenses | 852 | 807 |
| Other expenses | 15 699 | 18 773 |
| Total | 103 399 | 92 693 |
| EUR 1 000 | 2018 | 2017 |
| Audit fees | 109 | 113 |
| Other services | 86 | 170 |
| Total | 195 | 283 |
