Year	Number
1960	1885373
1961	1957720
1962	2029949
1963	2102369
1964	2173965
1965	2244010
1966	2312349
1967	2378018
1968	2441079
1969	2501559
1970	2559337
1971	2614335
1972	2666540
1973	2716929
1974	2767420
1975	2819564
1976	2873481
1977	2928658
1978	2984862
1979	3041988
1980	3099715
1981	3157388
1982	3214450
1983	3270969
1984	3327722
1985	3385304
1986	3445491
1987	3507912
1988	3569655
1989	3629248
1990	3685533
1991	3737231
1992	3784020
1993	3826377
1994	3864791
1995	3899639
1996	3931567
1997	3961684
1998	3990287
1999	4017064
2000	4041799
2001	4062362
2002	4078613
2003	4092760
2004	4105997
2005	4119703
2006	4134555
2007	4150199
2008	4166107
2009	4181200
2010	4194879
2011	4207081
2012	4217272
2013	4225244
2014	4230305
2015	4231990
2016	4225141
2017	4193709
2018	4123672
2019	4033895
2020	3950208
2021	3867069
2022	3799320
2023	3754523