Year	sq. km
1961	68890
1962	68890
1963	68890
1964	68890
1965	68890
1966	68890
1967	68890
1968	68890
1969	68890
1970	68890
1971	68890
1972	68890
1973	68890
1974	68890
1975	68890
1976	68890
1977	68890
1978	68890
1979	68890
1980	68890
1981	68890
1982	68890
1983	68890
1984	68890
1985	68890
1986	68890
1987	68890
1988	68890
1989	68890
1990	68890
1991	68890
1992	68890
1993	68890
1994	68890
1995	68890
1996	68890
1997	68890
1998	68890
1999	68890
2000	68890
2001	68890
2002	68890
2003	68890
2004	68890
2005	68890
2006	68890
2007	68890
2008	68890
2009	68890
2010	68890
2011	68890
2012	68890
2013	68890
2014	68890
2015	68890
2016	68890
2017	68890
2018	68890
2019	68890
2020	68890
2021	68890