| Classes of land use | 1990 | 1999 | 2016 | |||
| Surface area (×1000 ha) | % | Surface area (×1000 ha) | % | Surface area (×1000 ha) | % | |
| I | 4.0 | 0.6 | 11.0 | 1.6 | 12.1 | 1.8 |
| BS | 15.7 | 2.3 | 5.6 | 0.8 | 67.1 | 9.7 |
| CF | 15.3 | 2.2 | 24.5 | 3.6 | 43.7 | 6.3 |
| GS | 101.1 | 14.7 | 112.8 | 16.4 | 85.5 | 12.4 |
| WS | 295.4 | 42.9 | 399.7 | 58.0 | 349.9 | 50.8 |
| CFo | 112.1 | 16.3 | 72.4 | 10.5 | 41.1 | 6.0 |
| SF | 6.5 | 0.9 | 14.5 | 2.1 | 10.4 | 1.5 |
| GF | 139.3 | 20.2 | 49.0 | 7.1 | 79.6 | 11.5 |
| Total | 689.4 | 100.0 | 689.4 | 100.0 | 689.4 | 100.0 |
| Vegetation cover (GS + WS + CFo + SF + GF) | 654.4 | 95.0 | 648.5 | 94.0 | 566.4 | 82.1 |