Year	sq. km
1961	25678049.7
1962	25757611.8
1963	25837700
1964	25917570.5
1965	26009382.7
1966	26095828.6
1967	26172963.1
1968	26262618.3
1969	26332423.700000003
1970	26445968.400000002
1971	26570280.1
1972	26708750.6
1973	26837870.427
1974	26960626.455
1975	27065125.382
1976	27042154.742000002
1977	27187120.503000002
1978	27339487.664
1979	27458400.991
1980	27563586.198
1981	27623050.245
1982	27775944.872999996
1983	27921348.599999998
1984	28110653.827000003
1985	28320863.825
1986	28402240.482
1987	28534954.309000004
1988	28613916.936
1989	28713881.564
1990	28801698.790999997
1991	28872261.918
1992	28904084.785
1993	28904565.033
1994	28959179.376000002
1995	28934649.827
1996	28944938.925
1997	29100818.922
1998	29125238.542000003
1999	29174198.582
2000	29192113.432
2001	29193718.830999997
2002	29214347.395
2003	29072940.663999997
2004	29098880.755
2005	28954050.427
2006	28973458.544999998
2007	29003716.15
2008	28950256.946999997
2009	28951995.124999996
2010	29041304.112999998
2011	29041922.878999997
2012	29053717.745999996
2013	29077250.122999996
2014	29040525.551999997
2015	29077452.967
2016	29079868.328999996
2017	29085385.63599999
2018	29087068.696
2019	29066954.569999997
2020	29113610.683999997
2021	29123643.288