Year	sq. km
1961	155360
1962	155360
1963	155360
1964	155360
1965	155360
1966	155360
1967	155360
1968	155360
1969	155360
1970	155360
1971	155360
1972	155360
1973	155360
1974	155360
1975	155360
1976	155360
1977	155360
1978	155360
1979	155360
1980	155360
1981	155360
1982	155360
1983	155360
1984	155360
1985	155360
1986	155360
1987	155360
1988	155360
1989	155360
1990	155360
1991	155360
1992	155360
1993	155360
1994	155360
1995	155360
1996	155360
1997	155360
1998	155360
1999	155360
2000	155360
2001	155360
2002	155360
2003	155360
2004	155360
2005	155360
2006	155360
2007	155360
2008	155360
2009	155360
2010	155360
2011	155360
2012	155360
2013	155360
2014	155360
2015	155360
2016	155360
2017	155360
2018	155360
2019	155360
2020	155360
2021	155360