Year	Number
1960	188479
1961	189670
1962	190887
1963	192557
1964	194330
1965	197301
1966	201831
1967	206443
1968	211096
1969	215726
1970	220290
1971	224739
1972	229024
1973	233072
1974	236229
1975	240013
1976	245183
1977	249870
1978	253045
1979	254584
1980	256108
1981	257681
1982	259050
1983	261222
1984	264592
1985	269508
1986	276039
1987	284491
1988	295075
1989	307154
1990	318946
1991	327356
1992	333387
1993	339856
1994	346542
1995	352982
1996	358863
1997	364289
1998	369333
1999	373741
2000	378438
2001	384832
2002	392418
2003	400236
2004	408445
2005	417189
2006	425785
2007	433570
2008	439994
2009	445009
2010	450555
2011	457449
2012	463685
2013	467707
2014	469735
2015	470849
2016	471322
2017	471086
2018	470234
2019	468786
2020	467284
2021	466214
2022	465591
2023	465524