Year	sq. km
1961	196710
1962	196710
1963	196710
1964	196710
1965	196710
1966	196710
1967	196710
1968	196710
1969	196710
1970	196710
1971	196710
1972	196710
1973	196710
1974	196710
1975	196850
1976	196850
1977	196850
1978	196850
1979	196850
1980	196850
1981	196850
1982	196850
1983	196850
1984	196850
1985	196850
1986	196850
1987	196850
1988	196850
1989	196850
1990	196850
1991	196850
1992	196850
1993	196850
1994	196850
1995	196850
1996	196850
1997	196850
1998	196850
1999	196850
2000	196850
2001	196850
2002	196850
2003	196850
2004	196850
2005	196850
2006	196850
2007	196850
2008	196850
2009	196850
2010	196850
2011	196850
2012	196850
2013	196850
2014	196850
2015	196850
2016	196850
2017	196850
2018	196850
2019	196850
2020	196850
2021	196850