Year	sq. km
1961	547566
1962	547566
1963	547566
1964	547566
1965	547566
1966	547566
1967	547566
1968	547566
1969	547566
1970	547566
1971	547566
1972	547566
1973	547566
1974	547566
1975	547566
1976	547566
1977	547566
1978	547566
1979	547566
1980	547566
1981	547566
1982	547566
1983	547566
1984	547566
1985	547566
1986	547566
1987	547566
1988	547566
1989	547566
1990	547566
1991	547566
1992	547566
1993	547566
1994	547566
1995	547566
1996	547566
1997	547566
1998	547566
1999	547566
2000	547567
2001	547567
2002	547567
2003	547867
2004	547567
2005	547557
2006	547557
2007	547557
2008	547557
2009	547557
2010	547557
2011	547557
2012	547557
2013	547557
2014	547557
2015	547557
2016	547557
2017	547557
2018	547557
2019	547557
2020	547557
2021	547557