Year	Number
1960	3192218
1961	3266273
1962	3343811
1963	3417564
1964	3486132
1965	3552491
1966	3615742
1967	3672688
1968	3726066
1969	3776375
1970	3821051
1971	3861014
1972	3894330
1973	3921700
1974	3947372
1975	3975278
1976	4008482
1977	4044484
1978	4080710
1979	4119878
1980	4162816
1981	4206261
1982	4251454
1983	4301195
1984	4355365
1985	4417113
1986	4484559
1987	4555409
1988	4628920
1989	4707150
1990	4788807
1991	4861246
1992	4885892
1993	4902020
1994	4933839
1995	4953355
1996	4971378
1997	4985199
1998	4992000
1999	4995969
2000	4998937
2001	5002997
2002	5007275
2003	5005431
2004	4999389
2005	4993086
2006	4986517
2007	4980007
2008	4974652
2009	4969853
2010	4967754
2011	4966085
2012	4967256
2013	4977908
2014	4998128
2015	5014593
2016	5025290
2017	5035400
2018	5043036
2019	5045806
2020	5042976
2021	5039422
2022	5044133
2023	5043317