Year	sq. km
1961	4139269.11
1962	4139269.11
1963	4139269.11
1964	4139269.11
1965	4139269.11
1966	4139269.11
1967	4139269.11
1968	4139269.11
1969	4139269.11
1970	4139269.11
1971	4139269.11
1972	4139269.11
1973	4139269.11
1974	4139269.11
1975	4139269.11
1976	4139269.11
1977	4139269.11
1978	4139269.11
1979	4139269.11
1980	4139269.11
1981	4139269.11
1982	4139269.11
1983	4139269.11
1984	4139269.11
1985	4139269.11
1986	4139269.11
1987	4139269.11
1988	4139269.11
1989	4139269.11
1990	4139269.11
1991	4139269.11
1992	4139269.11
1993	4139289.11
1994	4139299.11
1995	4139319.11
1996	4139399.11
1997	4139399.11
1998	4139329.11
1999	4139329.11
2000	4139069.11
2001	4139089.11
2002	4139399.11
2003	4139803.11
2004	4139519.11
2005	4139539.11
2006	4139829.11
2007	4139809.11
2008	4139824.11
2009	4139959.11
2010	4140196.11
2011	4140205.11
2012	4140575.11
2013	4253795.720000001
2014	4253817.12
2015	4253858.890000001
2016	4254043.890000001
2017	4253849.12
2018	4253884.179
2019	4254304.896
2020	4254345.475000001
2021	4254350.224