Year	sq. km
1961	34688960
1962	34688960
1963	34688960
1964	34688960
1965	34688960
1966	34688960
1967	34688960
1968	34688960
1969	34688960
1970	34688960
1971	34688960
1972	34688960
1973	34688960
1974	34688960
1975	34688960
1976	34688830
1977	34688830
1978	34688830
1979	34688830
1980	34688830
1981	34688830
1982	34688830
1983	34688830
1984	34688830
1985	34688830
1986	34688830
1987	34688830
1988	34688830
1989	34688830
1990	34688830
1991	34689470
1992	54742655
1993	54738929
1994	54734055
1995	54731075
1996	54730631
1997	54731312
1998	54705321
1999	54712140
2000	54770802
2001	54769891.2
2002	54767549.2
2003	54767589.7
2004	54767858.5
2005	54767943.8
2006	54865231.4
2007	54865009.8
2008	54864138.8
2009	54861020
2010	54861018
2011	54861418
2012	54861203
2013	54858612
2014	54858481
2015	54858566
2016	54858522
2017	54858284
2018	54858263.3
2019	54857469.9
2020	54854105.6
2021	54869206.47