Year	sq. km
1961	770880
1962	770880
1963	770880
1964	770880
1965	770880
1966	770880
1967	770880
1968	770880
1969	770880
1970	770880
1971	770880
1972	770880
1973	770880
1974	770880
1975	770880
1976	770880
1977	770880
1978	770880
1979	770880
1980	770880
1981	770880
1982	770880
1983	770880
1984	770880
1985	770880
1986	770880
1987	770880
1988	770880
1989	770880
1990	770880
1991	770880
1992	770880
1993	770880
1994	770880
1995	770880
1996	770880
1997	770880
1998	770880
1999	770880
2000	770880
2001	770880
2002	770880
2003	770880
2004	770880
2005	770880
2006	770880
2007	770880
2008	770880
2009	770880
2010	770880
2011	770880
2012	770880
2013	770880
2014	770880
2015	770880
2016	770880
2017	770880
2018	770880
2019	770880
2020	770880
2021	770880