Year	Number
1960	2035657
1961	2105615
1962	2177707
1963	2248278
1964	2316619
1965	2385489
1966	2455660
1967	2526972
1968	2599487
1969	2672806
1970	2746245
1971	2819084
1972	2891475
1973	2963542
1974	3034843
1975	3105051
1976	3173510
1977	3239988
1978	3305104
1979	3369132
1980	3432218
1981	3495056
1982	3557593
1983	3619466
1984	3680919
1985	3742387
1986	3804304
1987	3865712
1988	3925766
1989	3984577
1990	4041839
1991	4097193
1992	4149973
1993	4199816
1994	4247373
1995	4292662
1996	4335361
1997	4375233
1998	4412271
1999	4446278
2000	4476614
2001	4503301
2002	4527252
2003	4549138
2004	4568829
2005	4586614
2006	4603374
2007	4620170
2008	4637245
2009	4654145
2010	4671030
2011	4688486
2012	4703195
2013	4709404
2014	4706916
2015	4699315
2016	4688584
2017	4677934
2018	4673860
2019	4670174
2020	4659213
2021	4644790
2022	4625015
2023	4599799