Year	sq. km
1961	6842494.300000001
1962	6853704.300000001
1963	6870764.300000001
1964	6882724.3
1965	6894374.300000001
1966	6901084.300000001
1967	6908234.3
1968	6924314.300000001
1969	6935784.300000001
1970	6939644.300000001
1971	6963224.300000001
1972	6975404.3
1973	6980316.3
1974	6984237.300000001
1975	7001097.300000001
1976	7010776.717
1977	7023579.133
1978	7039181.55
1979	7046153.967
1980	7054476.383
1981	7070828.800000001
1982	7078801.217
1983	7090723.633
1984	7102782.300000001
1985	7140450.967
1986	7186989.633
1987	7206848.3
1988	7249776.967
1989	7276635.633
1990	7289384.2
1991	7310663.267
1992	7343320.9350000005
1993	7216740.284
1994	7261159.749
1995	7304797.305
1996	7344047.518
1997	7383190.227
1998	7401771.1559999995
1999	7440437.654
2000	7468474.2299999995
2001	7503775.281
2002	7526637.137999999
2003	7579151.268
2004	7594358.852
2005	7680620.375000001
2006	7711563.287
2007	7750453.899
2008	7772552.305
2009	7819391.954
2010	7861419.825999999
2011	7895360.368
2012	7670678.5260000015
2013	7715065.834000001
2014	7737969.489
2015	7766539.731
2016	7788521.96
2017	7809561.887
2018	7844080.266999999
2019	7857957.182
2020	7873721.3610000005
2021	7884285.892000001