Year	Number
1960	6133239
1961	6156401
1962	6144787
1963	6142402
1964	6171222
1965	6224074
1966	6283650
1967	6347829
1968	6404197
1969	6450889
1970	6481843
1971	6494814
1972	6518197
1973	6553385
1974	6575389
1975	6569403
1976	6534288
1977	6475840
1978	6388497
1979	6266213
1980	6116864
1981	5955397
1982	5799852
1983	5654131
1984	5500840
1985	5346732
1986	5188898
1987	5025237
1988	4871216
1989	4721617
1990	4581105
1991	4393933
1992	4239439
1993	4174833
1994	4116606
1995	4069574
1996	4034035
1997	4007549
1998	3985296
1999	3968793
2000	3956124
2001	3944216
2002	3944771
2003	3953560
2004	3965159
2005	3978220
2006	3985526
2007	3997640
2008	4019245
2009	4039384
2010	4049484
2011	4046733
2012	4046043
2013	4076686
2014	4087569
2015	4048114
2016	3998709
2017	3947447
2018	3888611
2019	3786745
2020	3711020
2021	3633768
2022	3559269
2023	3482519