Year	sq. km
1961	1444290
1962	1444290
1963	1444290
1964	1444290
1965	1444290
1966	1444290
1967	1444290
1968	1444290
1969	1444290
1970	1444290
1971	1444290
1972	1444290
1973	1444290
1974	1444290
1975	1444290
1976	1444290
1977	1444290
1978	1444290
1979	1444290
1980	1444290
1981	1444290
1982	1444290
1983	1444290
1984	1444290
1985	1444290
1986	1444290
1987	1444290
1988	1444290
1989	1443300
1990	1443300
1991	1443410
1992	22889015
1993	22885289
1994	22880465
1995	22877475
1996	22877141
1997	22877832
1998	22880311
1999	22887140
2000	22890540
2001	22889581
2002	22888400
2003	22888479
2004	22888854
2005	22888926
2006	22986195
2007	22985978
2008	22985070
2009	22985119
2010	22985054
2011	22985051
2012	22984881
2013	22984900
2014	22983795
2015	22988615
2016	22988623
2017	22988632
2018	22988690.3
2019	22988583.9
2020	22985330.6
2021	22985363