Year	sq. km
1961	44740145.065
1962	44818973.035000004
1963	44907832.70200001
1964	44995668.516
1965	45099992.53
1966	45186526.777
1967	45288575.659
1968	45625099.83100001
1969	45669553.809
1970	45570056.30500001
1971	45728753.687
1972	45872357.52
1973	45973075.847
1974	46104824.37500001
1975	46207496.302
1976	46207917.979
1977	46258052.256
1978	46435655.834
1979	46518685.86500001
1980	46647637.767
1981	46700993.547000006
1982	46832276.104
1983	46905386.903
1984	47169477.30900001
1985	47452457.936
1986	47437189.672
1987	47614556.18700001
1988	47785436.56400001
1989	47897769.083
1990	48020138.014
1991	48066930.682000004
1992	48120858.447
1993	47953564.97799999
1994	48175796.627
1995	48163053.69
1996	48242599.31299999
1997	48444843.107
1998	48578918.782
1999	48608222.55200001
2000	48658072.78000001
2001	48677940.201
2002	48598261.629
2003	48415445.119
2004	48001414.017
2005	48074962.227
2006	48085665.286
2007	48001809.20500001
2008	47844078.34799999
2009	47784888.599
2010	47778821.436
2011	47966561.70600001
2012	47905619.056
2013	47804237.486999996
2014	47802474.39799998
2015	47584789.34399999
2016	47544868.221999995
2017	47863143.916999996
2018	47739251.72199999
2019	47770375.24899999
2020	47727706.138000004
2021	47812049.11299999