Year	% of land area
1993	11.292871287128712
1994	11.261584158415843
1995	11.230297029702971
1996	11.199009900990099
1997	11.167722772277228
1998	11.136435643564356
1999	11.105148514851486
2000	11.073861386138613
2001	11.042574257425743
2002	11.01128712871287
2003	10.979999999999999
2004	9.140320769201363
2005	9.110985579993397
2006	9.086474152253656
2007	9.058220228687796
2008	9.030254665605417
2009	9.003251617466425
2010	8.977483792336095
2011	8.949616385020772
2012	8.924026107240277
2013	8.90034222261119
2014	8.875197115639427
2015	8.845245977589583
2016	8.81997366660957
2017	8.794326890187035
2018	8.767757210876974
2019	8.741453808772881
2020	8.718215239586637
2021	8.69210834634981