Year	sq. km
1961	169560
1962	170990
1963	174300
1964	176680
1965	177500
1966	176750
1967	176840
1968	177800
1969	178190
1970	179130
1971	179220
1972	185650
1973	186152.22699999998
1974	186684.455
1975	187216.682
1976	187748.90899999999
1977	188481.13600000003
1978	189113.36399999997
1979	189745.59100000001
1980	190277.818
1981	190810.045
1982	191442.27300000002
1983	191974.5
1984	192606.72699999998
1985	193238.955
1986	193971.182
1987	194603.40899999999
1988	195235.63600000003
1989	195867.86399999997
1990	224370.09100000001
1991	225002.318
1992	225634.545
1993	226266.77300000002
1994	223498
1995	224968
1996	226437
1997	227906
1998	229375
1999	230844
2000	232313
2001	233782
2002	235251
2003	236720
2004	238189
2005	239928
2006	241527
2007	243126
2008	244735
2009	246334
2010	247943
2011	249642
2012	251002.6
2013	249673.7
2014	248315.8
2015	246958.04
2016	244430
2017	245181.08
2018	246985.89
2019	244782.9
2020	249969.9
2021	255156.89