Year	sq. km
1961	22681182.742
1962	22681182.742
1963	22681182.742
1964	22681182.742
1965	22681182.742
1966	22681182.742
1967	22681182.742
1968	22681182.742
1969	22681182.742
1970	22681182.742
1971	22681182.742
1972	22681182.742
1973	22681112.742
1974	22681072.742
1975	22681052.742
1976	22681052.742
1977	22681052.742
1978	22681052.742
1979	22681052.742
1980	22681052.742
1981	22681052.742
1982	22681052.742
1983	22681052.742
1984	22681052.742
1985	22681052.742
1986	22681052.742
1987	22681052.742
1988	22681052.742
1989	22681052.742
1990	22681052.742
1991	22681752.742
1992	24018262.742
1993	24018262.742
1994	24011339.742
1995	24011339.742
1996	24011339.742
1997	24011339.742
1998	24011339.742
1999	24011339.742
2000	24007824.742
2001	24007800.742
2002	24007250.968000002
2003	24013984.058
2004	24011915.019
2005	24014658.091
2006	24017722.093000002
2007	24017639.093000002
2008	24017642.086999997
2009	24018120.134
2010	24018386.417999998
2011	24018282.947
2012	24018306.946000002
2013	24017777.382999998
2014	24016936.921
2015	24020950.4
2016	24020672.4
2017	24014355.4
2018	24014397
2019	24014382.47
2020	24014684.803
2021	24014688