Year	sq. km
1961	131630
1962	132480
1963	132880
1964	133160
1965	132520
1966	132330
1967	132470
1968	132480
1969	130910
1970	130880
1971	130860
1972	134858
1973	134816.5
1974	134775
1975	139435
1976	143535
1977	142762
1978	144979
1979	144430
1980	145910
1981	151875
1982	146200
1983	145915
1984	144730
1985	143930
1986	143890
1987	142740
1988	141900
1989	141005
1990	139170
1991	137585.833
1992	136012.539
1993	134435.345
1994	132857.919
1995	131280.64800000002
1996	129703.315
1997	128126.617
1998	126549.99699999999
1999	124973.44900000001
2000	123397.12400000001
2001	121820.81300000001
2002	120244.045
2003	118580
2004	118900
2005	117120
2006	113750
2007	114870
2008	113740
2009	114900
2010	114080
2011	113710
2012	112094
2013	111060
2014	111160
2015	107120
2016	106140
2017	106440
2018	104980
2019	103450
2020	101540
2021	101750