Year	sq. km
1961	203220
1962	202620
1963	201840
1964	201300
1965	199460
1966	199470
1967	198190
1968	197770
1969	195570
1970	195430
1971	195080
1972	193710
1973	193260
1974	192570
1975	192240
1976	191990
1977	191590
1978	191110
1979	190480
1980	190070
1981	189100
1982	188910
1983	188790
1984	189390
1985	189140
1986	188790
1987	188690
1988	188200
1989	188070
1990	187930
1991	187530
1992	187430
1993	187150
1994	187070
1995	186220
1996	184740
1997	184570
1998	184430
1999	184350
2000	184130
2001	177880
2002	168990
2003	161690
2004	163270
2005	159060
2006	159570
2007	154690
2008	156010
2009	156190
2010	144490
2011	147790
2012	145290
2013	144100
2014	144240
2015	143710
2016	143740
2017	144620
2018	145120
2019	145230
2020	147330
2021	144994.6