Year	sq. km
1961	8777960
1962	8777960
1963	8777960
1964	8777960
1965	8777960
1966	8777960
1967	8777960
1968	8777960
1969	8777960
1970	8777960
1971	8777960
1972	8777960
1973	8777960
1974	8777960
1975	8777960
1976	8777960
1977	8777960
1978	8777960
1979	8777960
1980	8777960
1981	8777960
1982	8777960
1983	8777960
1984	8777960
1985	8777960
1986	8777960
1987	8777960
1988	8777960
1989	8777960
1990	8777960
1991	8777960
1992	8777960
1993	8777960
1994	8777960
1995	8777960
1996	8777960
1997	8777960
1998	8777960
1999	8777960
2000	8777960
2001	8777960
2002	8777960
2003	8777960
2004	8777960
2005	8777960
2006	8777960
2007	8777960
2008	8777960
2009	8775420
2010	8775420
2011	8775420
2012	8775420
2013	8775232
2014	8775232
2015	8775233
2016	8775233
2017	8775233
2018	8775233
2019	8775231
2020	8775231
2021	8775234