Year	sq. km
1961	24053934
1962	24053934
1963	24053934
1964	24053934
1965	24053934
1966	24053934
1967	24053934
1968	24053934
1969	24053934
1970	24053934
1971	24053934
1972	24053934
1973	24053934
1974	24053534
1975	24053274
1976	24053274
1977	24053274
1978	24053274
1979	24053274
1980	24053274
1981	24053274
1982	24053274
1983	24053274
1984	24053274
1985	24053274
1986	24053274
1987	24053274
1988	24053274
1989	24053274
1990	24053274
1991	24054154
1992	24811314
1993	24811314
1994	24804391
1995	24804391
1996	24804391
1997	24804391
1998	24804391
1999	24804391
2000	24815306
2001	24815252
2002	24815252
2003	24815028
2004	24961760.922
2005	24961742.092
2006	24961905.252
2007	24962145.665
2008	24961880.89
2009	24961881.284
2010	24962466.055
2011	24962696.05
2012	25086477.142
2013	25086358.326
2014	25085137.467
2015	25089189.128
2016	25088914.968000002
2017	25088820.053
2018	25088751.143000003
2019	25088731.873999998
2020	25088746.094
2021	25088749.094