Year	sq. km
1961	15801898.742
1962	15801898.742
1963	15801898.742
1964	15801898.742
1965	15801898.742
1966	15801898.742
1967	15801898.742
1968	15801898.742
1969	15801898.742
1970	15801898.742
1971	15801898.742
1972	15801898.742
1973	15801868.742
1974	15801828.742
1975	15801808.742
1976	15801808.742
1977	15801808.742
1978	15801808.742
1979	15801808.742
1980	15801808.742
1981	15801808.742
1982	15801808.742
1983	15801808.742
1984	15801808.742
1985	15801808.742
1986	15801808.742
1987	15801808.742
1988	15801808.742
1989	15801808.742
1990	15801808.742
1991	15803148.742
1992	15803148.742
1993	15803148.742
1994	15803148.742
1995	15803138.742
1996	15803128.742
1997	15803128.742
1998	15803128.742
1999	15803128.742
2000	15854637.742
2001	15854661.942
2002	15854121.168
2003	15860887.758
2004	15860525.519
2005	15863231.891
2006	15866314.493
2007	15866126.893000001
2008	15866156.887
2009	15866117.134
2010	15866436.418
2011	15866415.947
2012	15866448.946
2013	15865930.383
2014	15866293.921
2015	15866308.4
2016	15866011.4
2017	15865947.4
2018	15865923
2019	15865926
2020	15866144.803
2021	15881181.47