Year	Number
1960	5817583
1961	5972576
1962	6070112
1963	6136505
1964	6147134
1965	6130347
1966	6114475
1967	6096230
1968	6073523
1969	6027931
1970	5966952
1971	5922771
1972	5885460
1973	5830909
1974	5757919
1975	5681996
1976	5608899
1977	5536166
1978	5457660
1979	5422575
1980	5438553
1981	5459805
1982	5475094
1983	5514888
1984	5570579
1985	5613363
1986	5645195
1987	5660039
1988	5665955
1989	5676665
1990	5664988
1991	5638612
1992	5615927
1993	5575034
1994	5483254
1995	5355030
1996	5210459
1997	5052075
1998	4858697
1999	4639122
2000	4421997
2001	4192896
2002	3975311
2003	3806156
2004	3665981
2005	3542961
2006	3444709
2007	3377088
2008	3344707
2009	3341578
2010	3348152
2011	3362203
2012	3395743
2013	3443447
2014	3485419
2015	3526836
2016	3555428
2017	3568775
2018	3557434
2019	3528260
2020	3490689
2021	3439545
2022	3027888
2023	2943485