Year	sq. km
1961	27830
1962	27830
1963	27830
1964	27830
1965	27830
1966	27830
1967	27830
1968	27830
1969	27830
1970	27830
1971	27830
1972	27830
1973	27830
1974	27830
1975	27830
1976	27830
1977	27830
1978	27830
1979	27830
1980	27830
1981	27830
1982	27830
1983	27830
1984	27830
1985	27830
1986	27830
1987	27830
1988	27830
1989	27830
1990	27830
1991	27830
1992	27830
1993	27830
1994	27830
1995	27830
1996	27830
1997	27830
1998	27830
1999	27830
2000	27830
2001	27830
2002	27830
2003	27830
2004	27830
2005	27830
2006	27830
2007	27830
2008	27830
2009	27830
2010	27830
2011	27830
2012	27830
2013	27830
2014	27830
2015	27830
2016	27830
2017	27830
2018	27830
2019	27830
2020	27830
2021	27830