Year	% of land area
1992	2.0211053478805225
1993	2.092648900017886
1994	2.092648900017886
1995	2.074763011983545
1996	2.232940335834227
1997	2.232940335834227
1998	2.3072795564299766
1999	2.3072795564299766
2000	1.2340821290599513
2001	1.2519673773071969
2002	1.2519673773071969
2003	1.2686727181759703
2004	1.2508040883425058
2005	1.304409977842899
2006	1.358015867343292
2007	1.4294903866771496
2008	1.5367021656779358
2009	1.5724394253448646
2010	1.500964906011007
2011	1.4830962761775428
2012	1.411621756843685
2013	1.3026231148595526
2014	1.3866056750768352
2015	1.34908155242656
2016	1.2865413480094348
2017	1.2865413480094348
2018	1.2865413480094348
2019	1.3222786076763633
2020	1.411722659042173
2021	1.411722659042173