Year	sq. km
1961	737300
1962	737280
1963	737290
1964	737290
1965	737280
1966	737270
1967	737260
1968	737250
1969	737250
1970	737240
1971	737230
1972	737230
1973	737230
1974	737230
1975	737230
1976	737210
1977	737220
1978	737230
1979	737180
1980	737170
1981	737160
1982	737150
1983	737140
1984	737140
1985	737140
1986	737140
1987	737140
1988	737130
1989	736140
1990	736140
1991	736250
1992	979597
1993	1104957
1994	1105007
1995	1104987
1996	1105087
1997	1105037
1998	1105027
1999	1105037
2000	1104969
2001	1104969
2002	1103299
2003	1103361
2004	1103471
2005	1103321
2006	1103291
2007	1103181
2008	1103162.2
2009	1104161.8
2010	1104143.2
2011	1104209
2012	1104048.7
2013	1105114
2014	1105841
2015	1105835.6
2016	1105825
2017	1105100.1
2018	1105067.4
2019	1104992.9
2020	1105004.93
2021	1104953.23