Year	Number
1960	1453353
1961	1534902
1962	1640147
1963	1752608
1964	1872951
1965	2001192
1966	2136617
1967	2280326
1968	2433920
1969	2597394
1970	2772095
1971	2931066
1972	3085926
1973	3248509
1974	3419899
1975	3600332
1976	3759125
1977	3909144
1978	4065369
1979	4227838
1980	4397037
1981	4580127
1982	4774228
1983	4976556
1984	5187754
1985	5407297
1986	5623536
1987	5842560
1988	6070435
1989	6306534
1990	6552160
1991	6773134
1992	6986256
1993	7205470
1994	7431880
1995	7665403
1996	7906601
1997	8154694
1998	8367183.999999999
1999	8553323
2000	8743868
2001	9030318
2002	9369562
2003	9721551
2004	10087275
2005	10465694
2006	10858861
2007	11266798
2008	11690655
2009	12129224
2010	12584885
2011	13057664
2012	13419412
2013	13658365
2014	13901910
2015	14126772
2016	14332066
2017	14539767
2018	14750771
2019	14967667
2020	15190336
2021	15415197
2022	15636243
2023	15847768