Year	sq. km
1961	81390
1962	81490
1963	81590
1964	81690
1965	81790
1966	81900
1967	82000
1968	82100
1969	82220
1970	82360
1971	82200
1972	83020
1973	83730
1974	84530
1975	85360
1976	85850
1977	86350
1978	86850
1979	87350
1980	87850
1981	88350
1982	88850
1983	89350
1984	89850
1985	90350
1986	90850
1987	91400
1988	95640
1989	96000
1990	95750
1991	95500
1992	95250
1993	95000
1994	94310
1995	94500
1996	95500
1997	98500
1998	99700
1999	100660
2000	101630
2001	102630
2002	103610
2003	104580
2004	105710
2005	106830
2006	107900
2007	108910
2008	109995
2009	111120
2010	112420
2011	114130
2012	115390
2013	117250
2014	118500
2015	119860
2016	121020
2017	122170
2018	124130
2019	125190
2020	126140
2021	127400