Year	sq. km
1961	7026224.3
1962	7036414.300000001
1963	7054094.3
1964	7065164.3
1965	7075694.3
1966	7082734.3
1967	7089004.3
1968	7103134.3
1969	7109974.3
1970	7114124.3
1971	7121184.3
1972	7131134.3
1973	7129986.3
1974	7126457.3
1975	7135147.3
1976	7140704.3
1977	7142464.3
1978	7156604.3
1979	7156324.3
1980	7164684.3
1981	7174034.3
1982	7178530.3
1983	7188966.3
1984	7190312.3
1985	7226998.3
1986	7269094.3
1987	7291960.3
1988	7337176.3
1989	7362302.3
1990	7375378.2
1991	7392879.600000001
1992	7413390.602
1993	7278953.284
1994	7318816.082
1995	7355517.972
1996	7391301.518000001
1997	7427010.609999999
1998	7450919.716
1999	7491096.15
2000	7527239.362000001
2001	7562638.640000001
2002	7582643.342999999
2003	7645519.309
2004	7665079.779999999
2005	7744828.579
2006	7777963.364
2007	7814013.379
2008	7841077.698
2009	7889259.301
2010	7930281.4459999995
2011	7966418.848999999
2012	8024821.489
2013	8065491.564999999
2014	8090143.649
2015	8112659.410999999
2016	8139648.751999999
2017	8166673.152
2018	8186480.6959999995
2019	8198280.577999999
2020	8212479.096999999
2021	8221154.216999999