Year	sq. km
1961	9166270
1962	9166270
1963	9166270
1964	9166270
1965	9166270
1966	9166270
1967	9166270
1968	9166270
1969	9166270
1970	9166270
1971	9166270
1972	9166270
1973	9166270
1974	9166270
1975	9166270
1976	9166270
1977	9166270
1978	9166270
1979	9166270
1980	9166270
1981	9166270
1982	9166270
1983	9166270
1984	9166270
1985	9166270
1986	9166270
1987	9166270
1988	9166270
1989	9166270
1990	9166270
1991	9166270
1992	9166270
1993	9166270
1994	9166270
1995	9166270
1996	9166270
1997	9166270
1998	9166270
1999	9166270
2000	9166270
2001	9166270
2002	9166270
2003	9166270
2004	9166270
2005	9166270
2006	9166270
2007	9166270
2008	9166270
2009	9166270
2010	9166270
2011	9166270
2012	9166270
2013	9166270
2014	9166270
2015	9166270
2016	9166270
2017	9166270
2018	9166270
2019	9166260
2020	9166260
2021	9166260