Year	sq. km
1961	14472740
1962	14472740
1963	14472740
1964	14472740
1965	14472740
1966	14472740
1967	14472740
1968	14472740
1969	14472740
1970	14472740
1971	14472740
1972	14472740
1973	14472740
1974	14472340
1975	14471940
1976	14471940
1977	14471940
1978	14471940
1979	14471940
1980	14471940
1981	14471940
1982	14471940
1983	14471940
1984	14471940
1985	14471940
1986	14471940
1987	14471940
1988	14471940
1989	14471940
1990	14471940
1991	14471940
1992	14471940
1993	14471940
1994	14471940
1995	14471940
1996	14471940
1997	14471940
1998	14471940
1999	14471940
2000	14471940
2001	14471940
2002	14471940
2003	14471750
2004	14620309.922
2005	14620355.092
2006	14620407.252
2007	14620463.665
2008	14620425.89
2009	14620458.284
2010	14621136.055
2011	14621419.05
2012	14745349.142
2013	14745311.326
2014	14745264.467
2015	14745318.127999999
2016	14745325.968
2017	14745314.053
2018	14745329.143
2019	14745341.404
2020	14745302.094
2021	14745302.094