Year	Number
1960	3713810
1961	3848515
1962	3984776
1963	4122271
1964	4255437
1965	4380814
1966	4500220
1967	4612093
1968	4714345
1969	4805607
1970	4885763
1971	4954839
1972	5013582
1973	5064056
1974	5108180
1975	5147903
1976	5184974
1977	5221782
1978	5260000
1979	5300221
1980	5343616
1981	5390784
1982	5442564
1983	5499427
1984	5561593
1985	5627188
1986	5697349
1987	5773600
1988	5853428
1989	5935566
1990	6018303
1991	6098167
1992	6173080
1993	6242546
1994	6304798
1995	6358959
1996	6405252
1997	6443624
1998	6475117
1999	6500328
2000	6518801
2001	6530073
2002	6533488
2003	6528094
2004	6512552
2005	6485776
2006	6445683
2007	6393608
2008	6332596
2009	6266788
2010	6200549
2011	6133109
2012	6064327
2013	5995204
2014	5925823
2015	5859356
2016	5802571
2017	5762549
2018	5736828
2019	5716525
2020	5695619
2021	5675317
2022	5647955
2023	5612107