Year	sq. km
1990	35754.7
1991	35342.18
1992	34929.66
1993	34517.14
1994	34104.62
1995	33692.1
1996	33279.58
1997	32867.06
1998	32454.54
1999	32042.02
2000	31629.5
2001	31216.97
2002	30804.44
2003	30391.91
2004	29979.38
2005	29566.85
2006	29154.32
2007	28741.79
2008	28329.26
2009	27916.73
2010	27504.2
2011	27091.68
2012	26679.16
2013	26266.64
2014	25854.12
2015	25441.6
2016	25029.1
2017	24616.6
2018	24204.1
2019	23791.5
2020	23379
2021	22966.432999999997