| 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 | 28 356 | 24 223 |
| Real estate tax | 6 135 | 4 828 |
| Rents | 946 | 1 204 |
| ICT expenses | 4 090 | 3 937 |
| Personnel related expenses | 4 869 | 4 267 |
| Corporate communication expenses | 859 | 810 |
| Other expenses | 15 716 | 18 795 |
| Total | 103 401 | 92 717 |
| EUR 1 000 | 2018 | 2017 |
| Audit fees | 115 | 115 |
| Other services | 87 | 170 |
| Total | 202 | 285 |
