Year	sq. km
1961	13796798.9
1962	13796798.9
1963	13796798.9
1964	13796798.9
1965	13796798.9
1966	13796798.9
1967	13796798.9
1968	13796798.9
1969	13796798.9
1970	13796798.9
1971	13796798.9
1972	13796798.9
1973	13796798.9
1974	13796798.9
1975	13796798.9
1976	13796798.9
1977	13796798.9
1978	13796798.9
1979	13796798.9
1980	13796798.9
1981	13796798.9
1982	13796798.9
1983	13796798.9
1984	13796798.9
1985	13796798.9
1986	13796798.9
1987	13796798.9
1988	13796798.9
1989	13796798.9
1990	13796798.9
1991	13796798.9
1992	13796818.9
1993	13796818.9
1994	13796818.9
1995	13796818.9
1996	13796818.9
1997	13796818.9
1998	13796818.9
1999	13796818.9
2000	13796818.9
2001	13796818.9
2002	13796818.9
2003	13796828.9
2004	13796838.9
2005	13796848.9
2006	13796848.9
2007	13796858.9
2008	13796868.9
2009	13794328.9
2010	13794330.9
2011	13794335.9
2012	13166528.9
2013	13166340.9
2014	13166221.9
2015	13166229.9
2016	13166230.9
2017	13166231.9
2018	13166231.9
2019	13166232.9
2020	13166234.9
2021	13166242.9