Year	Number
1960	1621733
1961	1695020
1962	1772116
1963	1853131
1964	1938408
1965	2027817
1966	2121974
1967	2221022
1968	2325392
1969	2434941
1970	2550432
1971	2672057
1972	2772332
1973	2874617
1974	2980932
1975	3091291
1976	3206015
1977	3324786
1978	3448257
1979	3576446
1980	3709726
1981	3847732
1982	3991222
1983	4107149.0000000005
1984	4219571
1985	4334928
1986	4453791
1987	4576104
1988	4702151
1989	4831511
1990	4964826
1991	5102037
1992	5243460
1993	5388630
1994	5538265
1995	5637372
1996	5726973
1997	5817933
1998	5910660
1999	6005062
2000	6101307
2001	6199029
2002	6298667
2003	6400122
2004	6503578
2005	6590321
2006	6674942
2007	6761171
2008	6849177
2009	6938638
2010	7029966
2011	7123091
2012	7218193
2013	7314930
2014	7413749
2015	7514578
2016	7617472
2017	7722492
2018	7829698
2019	7941338
2020	8059162
2021	8184281
2022	8316885
2023	8456442