Year	sq. km
1961	810230
1962	810470
1963	810690
1964	810970
1965	811051
1966	811451
1967	811801
1968	811541
1969	811171
1970	809846
1971	809411
1972	809781
1973	810223
1974	809340
1975	806924
1976	807352.417
1977	806836.833
1978	806841.25
1979	805952.667
1980	804873.083
1981	804912.5
1982	804787.917
1983	804308.333
1984	804754
1985	805163.667
1986	805444.333
1987	806202.6
1988	806420.667
1989	806007.733
1990	806501.8
1991	806351.287
1992	806102.973
1993	807802.66
1994	806626.347
1995	806792.483
1996	807430.6200000001
1997	807409.757
1998	806987.8929999999
1999	807308.03
2000	808338.367
2001	806608.973
2002	805055.6799999999
2003	805979.287
2004	805839.293
2005	807153.9
2006	806910.34
2007	806691.6799999999
2008	807881.22
2009	809194.46
2010	808732.533
2011	809542.56
2012	809173.8200000001
2013	806234.1449999999
2014	808128.8200000001
2015	806788.4600000001
2016	808228.66
2017	808629.46
2018	808943.0289999999
2019	808819.5439999999
2020	808804.753
2021	808767.1089999999