Year IUCN Cat. Ia and Ib (ha) - number IUCN Cat. II (ha) - number IUCN Cat. IV (ha) - number IUCN Cat. Ia and Ib (ha) IUCN Cat. II (ha) IUCN Cat. IV (ha)
1990 186700 195780 0 48.81 51.19 0
1995 192190 237670 0 44.71 55.29 0
2000 192190 237670 0 44.71 55.29 0
2005 200889 285179 117752 33.27 47.23 19.5
2010 209083 361157 310534 23.74 41 35.26
2015 209083 361157 322306 23.43 40.46 36.11
2018 120720 361157 421360 13.37 39.98 46.65