Year	sq. km
1961	1260000
1962	1260000
1963	1260000
1964	1260000
1965	1260000
1966	1260000
1967	1260000
1968	1260000
1969	1260000
1970	1260000
1971	1260000
1972	1260000
1973	1260000
1974	1259600
1975	1259200
1976	1259200
1977	1259200
1978	1259200
1979	1259200
1980	1259200
1981	1259200
1982	1259200
1983	1259200
1984	1259200
1985	1259200
1986	1259200
1987	1259200
1988	1259200
1989	1259200
1990	1259200
1991	1259200
1992	1259200
1993	1259200
1994	1259200
1995	1259200
1996	1259200
1997	1259200
1998	1259200
1999	1259200
2000	1259200
2001	1259200
2002	1259200
2003	1259200
2004	1259200
2005	1259200
2006	1259200
2007	1259200
2008	1259200
2009	1259200
2010	1259200
2011	1259200
2012	1259200
2013	1259200
2014	1259200
2015	1259200
2016	1259200
2017	1259200
2018	1259200
2019	1259200
2020	1259200
2021	1259200