Year	sq. km
1961	446340
1962	446340
1963	446340
1964	446340
1965	446340
1966	446340
1967	446340
1968	446340
1969	446340
1970	446340
1971	446340
1972	446340
1973	446300
1974	446300
1975	446300
1976	446300
1977	446300
1978	446300
1979	446300
1980	446300
1981	446300
1982	446300
1983	446300
1984	446300
1985	446300
1986	446300
1987	446300
1988	446300
1989	446300
1990	446300
1991	446300
1992	446300
1993	446300
1994	446300
1995	446300
1996	446300
1997	446300
1998	446300
1999	446300
2000	446300
2001	446300
2002	446300
2003	446300
2004	446300
2005	446300
2006	446300
2007	446300
2008	446300
2009	446300
2010	446300
2011	446300
2012	446300
2013	446300
2014	446300
2015	446300
2016	446300
2017	446300
2018	446300
2019	446300
2020	446300
2021	446300