Year	sq. km
1961	28381885.137
1962	28381885.137
1963	28381885.137
1964	28381885.137
1965	28381885.137
1966	28381885.137
1967	28381885.137
1968	28381885.137
1969	28381885.137
1970	28381885.137
1971	28381885.137
1972	28381885.137
1973	28381885.137
1974	28381885.137
1975	28381885.137
1976	28381885.137
1977	28381885.137
1978	28381885.137
1979	28381885.836999997
1980	28381885.836999997
1981	28381885.836999997
1982	28381885.836999997
1983	28381885.836999997
1984	28381885.836999997
1985	28381885.836999997
1986	28381885.836999997
1987	28381885.836999997
1988	28381885.836999997
1989	28381885.836999997
1990	28381885.836999997
1991	28381885.836999997
1992	28381885.836999997
1993	28381975.836999997
1994	28381985.836999997
1995	28382015.836999997
1996	28382095.836999997
1997	28450835.836999997
1998	28450765.836999997
1999	28450765.836999997
2000	28447208.836999997
2001	28447228.836999997
2002	28447538.836999997
2003	28447942.836999997
2004	28447668.836999997
2005	28447688.836999997
2006	28447978.836999997
2007	28448031.73
2008	28448046.73
2009	28448180.73
2010	28448427.73
2011	28448436.73
2012	28448806.73
2013	28802066.45
2014	28800918.740000002
2015	28805748.29
2016	28805943.51
2017	28805771.740000002
2018	28805811.799
2019	28806227.516
2020	28813751.765000004
2021	28813792.007999998