Year	sq. km
1961	34973429.727
1962	34973409.727
1963	34973419.727
1964	34973419.727
1965	34973409.727
1966	34973399.727
1967	34973389.727
1968	34973379.727
1969	34973379.727
1970	34973369.727
1971	34973359.727
1972	34973259.727
1973	34973259.727
1974	34973229.727
1975	34973139.727
1976	34973059.727
1977	34972929.727
1978	34972929.727
1979	34972890.437
1980	34972620.43700001
1981	34972700.437
1982	34972480.437
1983	34972440.437
1984	34970950.517000005
1985	34970850.597
1986	34970950.677
1987	34970850.757
1988	34970840.837
1989	34969850.916999996
1990	34969850.996999994
1991	34970421.07700001
1992	35213788.157
1993	35339138.237
1994	35339178.317
1995	35339208.397
1996	35339197.180999994
1997	35407855.964
1998	35407814.746
1999	35407783.527
2000	35444478.768
2001	35444233.547
2002	35444928.326
2003	35445471.104
2004	35445252.881
2005	35445121.657
2006	35444506.032
2007	35444526.407
2008	35429552.008999996
2009	35430601.311000004
2010	35432036.312
2011	35432466.713
2012	35432740.815
2013	35434127.075
2014	35434525.916
2015	35434006.657000005
2016	35444118.587
2017	35443399.60700001
2018	35444070.13599999
2019	35444024.14299999
2020	35443200.72400001
2021	35266437.48799999