| Year | Reservation (ha) | National Nature Park (ha) | Regional Landscape Park (ha) | Biosphere Reserves (ha) | Nature Reserve (ha) | Other (ha) |
|---|---|---|---|---|---|---|
| 1992 | 818700 | 123200 | 60000 | 0 | 207600 | 107300 |
| 2003 | 1074300 | 632100 | 618400 | 222500 | 163700 | 124200 |
| 2013 | 1776000 | 1221800 | 768980 | 252200 | 200500 | 141800 |
| 2017 | 1789200 | 1311600 | 768500 | 479110 | 206600 | 143400 |