Year	sq. km
1961	407339.7
1962	407339.7
1963	407339.7
1964	407339.7
1965	407339.7
1966	407339.7
1967	407339.7
1968	407339.7
1969	407339.7
1970	407339.7
1971	407339.7
1972	407339.7
1973	407339.7
1974	407339.7
1975	407339.7
1976	407339.7
1977	407339.7
1978	407339.7
1979	407339.7
1980	407339.7
1981	407339.7
1982	407339.7
1983	407339.7
1984	407339.7
1985	407339.7
1986	407339.7
1987	407339.7
1988	407339.7
1989	407339.7
1990	407339.7
1991	407339.7
1992	407339.7
1993	407339.7
1994	407339.7
1995	407339.7
1996	407339.7
1997	407339.7
1998	407339.7
1999	407339.7
2000	407339.7
2001	407339.7
2002	407339.7
2003	407339.7
2004	407339.7
2005	407339.7
2006	407339.7
2007	407339.7
2008	407339.7
2009	407339.7
2010	407339.7
2011	407339.7
2012	407339.7
2013	407339.7
2014	407339.7
2015	407310.64
2016	407310.64
2017	407310.64
2018	407310.64
2019	407283.59
2020	407283.532
2021	407283.54