Year	sq. km
1961	18580
1962	18580
1963	18580
1964	18580
1965	18580
1966	18580
1967	18580
1968	18580
1969	18580
1970	18580
1971	18580
1972	18580
1973	18580
1974	18580
1975	18580
1976	18580
1977	18580
1978	18580
1979	18580
1980	18580
1981	18580
1982	18580
1983	18580
1984	18580
1985	18580
1986	18580
1987	18580
1988	18580
1989	18580
1990	18580
1991	18580
1992	18580
1993	18580
1994	18580
1995	18580
1996	18580
1997	18580
1998	18580
1999	18580
2000	18580
2001	18580
2002	18580
2003	18580
2004	18580
2005	18580
2006	18580
2007	18580
2008	18580
2009	18580
2010	18580
2011	18580
2012	18580
2013	18580
2014	18580
2015	18580
2016	18580
2017	18580
2018	18580
2019	18580
2020	18580
2021	18580