| N | Full time equivalent | |
|---|---|---|
| 2000 | 49659 | 45954 |
| 2005 | 46074 | 41713 |
| 2010 | 37885 | 33176 |
| 2011 | 36292 | 30501 |
| 2012 | 34405 | 29643 |
| 2013 | 33273 | 28523 |
| 2014 | 31805 | 27268 |
| 2015 | 31150 | 26587 |
| 2016 | 30816 | 25880 |
| 2017 | 31124 | 26412 |
| 2018 | 31256 | 26691 |
| 2019 | 31701 | 26792 |
| 2020 | 32859 | 26800 |
| 2021 | 34011 | 28293 |