Year	sq. km
1961	57370142.742
1962	57370142.742
1963	57370142.742
1964	57370142.742
1965	57370142.742
1966	57370142.742
1967	57370142.742
1968	57370142.742
1969	57370142.742
1970	57370142.742
1971	57370142.742
1972	57370142.742
1973	57370072.742
1974	57370032.742
1975	57370012.742
1976	57369882.742
1977	57369882.742
1978	57369882.742
1979	57369882.742
1980	57369882.742
1981	57369882.742
1982	57369882.742
1983	57369882.742
1984	57369882.742
1985	57369882.742
1986	57369882.742
1987	57369882.742
1988	57369882.742
1989	57369882.742
1990	57369882.742
1991	57371222.742
1992	78760917.742
1993	78757191.742
1994	78745394.742
1995	78742414.742
1996	78741970.742
1997	78742651.742
1998	78716660.742
1999	78723479.742
2000	78778626.742
2001	78777691.942
2002	78774800.168
2003	78781573.758
2004	78779773.519
2005	78782601.891
2006	78882953.493
2007	78882648.893
2008	78881780.887
2009	78879140.134
2010	78879404.418
2011	78879700.947
2012	78879509.946
2013	78876389.383
2014	78875417.921
2015	78879516.4
2016	78879194.4
2017	78872639.4
2018	78872660.3
2019	78871852.37
2020	78868790.403
2021	78883894.47