Year	sq. km
1961	227540
1962	227540
1963	227540
1964	227540
1965	227540
1966	227540
1967	227540
1968	227540
1969	227540
1970	227540
1971	227540
1972	227540
1973	227540
1974	227540
1975	227540
1976	227540
1977	227540
1978	227540
1979	227540
1980	227540
1981	227540
1982	227540
1983	227540
1984	227540
1985	227540
1986	227540
1987	227540
1988	227540
1989	227540
1990	227540
1991	227540
1992	227540
1993	227540
1994	227540
1995	227540
1996	227540
1997	227540
1998	227540
1999	227540
2000	227540
2001	227540
2002	227540
2003	227540
2004	227540
2005	227540
2006	227540
2007	227540
2008	227540
2009	227540
2010	227540
2011	227540
2012	227540
2013	227540
2014	227540
2015	227540
2016	227540
2017	227540
2018	227540
2019	227540
2020	227533
2021	227533