Year	Number
1960	73431
1961	75223
1962	77498
1963	80303
1964	83758
1965	87712
1966	92083
1967	96472
1968	100618
1969	104504
1970	108095
1971	111362
1972	114381
1973	117462
1974	120884
1975	124741
1976	128963
1977	133169
1978	137048
1979	140141
1980	142098
1981	143133
1982	143872
1983	144866
1984	146622
1985	149326
1986	153474
1987	158858
1988	164318
1989	169650
1990	174316
1991	177712
1992	180990
1993	184492
1994	186527
1995	187338
1996	187855
1997	187472
1998	188103
1999	188972
2000	190147
2001	191213
2002	191657
2003	190931
2004	190974
2005	192019
2006	193108
2007	194297
2008	194298
2009	192744
2010	190437
2011	188769
2012	188242
2013	190577
2014	196822
2015	203297
2016	208842
2017	212614
2018	215775
2019	219380
2020	223495
2021	225200
2022	210241
2023	200858