Year	sq. km
1961	192530
1962	192530
1963	192530
1964	192530
1965	192530
1966	192530
1967	192530
1968	192530
1969	192530
1970	192530
1971	192530
1972	192530
1973	192530
1974	192530
1975	192530
1976	192530
1977	192530
1978	192530
1979	192530
1980	192530
1981	192530
1982	192530
1983	192530
1984	192530
1985	192530
1986	192530
1987	192530
1988	192530
1989	192530
1990	192530
1991	192530
1992	192530
1993	192530
1994	192530
1995	192530
1996	192530
1997	192530
1998	192530
1999	192530
2000	192530
2001	192530
2002	192530
2003	192530
2004	192530
2005	192530
2006	192530
2007	192530
2008	192530
2009	192530
2010	192530
2011	192530
2012	192530
2013	192530
2014	192530
2015	192530
2016	192530
2017	192530
2018	192530
2019	192530
2020	192530
2021	192530