Year	sq. km
1990	433780
1991	431590
1992	429400
1993	427210
1994	425020
1995	422830
1996	420640
1997	418450
1998	416260
1999	414070
2000	411880
2001	409664.14
2002	407448.28
2003	405232.42
2004	403016.56
2005	400800.7
2006	398584.84
2007	396368.98
2008	394153.12
2009	391937.26
2010	389721.4
2011	387657.12
2012	385592.84
2013	383528.56
2014	381464.28
2015	379400
2016	376282.9
2017	374066
2018	372241.68
2019	369661.1
2020	367437.6
2021	364976.047