Year	sq. km
1961	43
1962	43
1963	43
1964	43
1965	43
1966	43
1967	43
1968	43
1969	43
1970	43
1971	43
1972	43
1973	43
1974	43
1975	43
1976	43
1977	43
1978	43
1979	43
1980	43
1981	43
1982	43
1983	43
1984	43
1985	43
1986	43
1987	43
1988	43
1989	43
1990	43
1991	43
1992	43
1993	43
1994	43
1995	43
1996	43
1997	43
1998	43
1999	43
2000	43
2001	43
2002	43
2003	43
2004	43
2005	43
2006	43
2007	43
2008	43
2009	43
2010	43
2011	43
2012	43
2013	43
2014	43
2015	43
2016	43
2017	43
2018	43
2019	43
2020	43
2021	43