Year	sq. km
1961	24396148.742
1962	24396148.742
1963	24396148.742
1964	24396148.742
1965	24396148.742
1966	24396148.742
1967	24396148.742
1968	24396148.742
1969	24396148.742
1970	24396148.742
1971	24396148.742
1972	24396048.742
1973	24396018.742
1974	24395978.742
1975	24395848.742
1976	24395848.742
1977	24395738.742
1978	24395738.742
1979	24395738.742
1980	24395638.742
1981	24395738.742
1982	24395528.742
1983	24395528.742
1984	24394028.742
1985	24393928.742
1986	24394028.742
1987	24393928.742
1988	24393928.742
1989	24393928.742
1990	24393928.742
1991	24395728.742
1992	24395728.742
1993	24395728.742
1994	24395728.742
1995	24395778.742
1996	24395668.742
1997	24395668.742
1998	24395668.742
1999	24395668.742
2000	24446988.742
2001	24447298.941999998
2002	24446814.167999998
2003	24453602.758
2004	24453263.519
2005	24455999.891000003
2006	24459118.093
2007	24458972.093
2008	24459077.087
2009	24459107.634
2010	24459569.118
2011	24459540.847
2012	24459695.845999997
2013	24459294.683
2014	24459664.221
2015	24459693.8
2016	24469160.9
2017	24469121.2
2018	24469110.9
2019	24469195.9
2020	24469416.703
2021	24484453.47