Year	Number
1960	228067
1961	243525
1962	260113
1963	275248
1964	291286
1965	316700
1966	344423
1967	374629
1968	407594
1969	443323
1970	481051
1971	522030
1972	566610
1973	614906
1974	667447
1975	724534
1976	782304
1977	828738
1978	878044
1979	930329
1980	985857
1981	1044584.0000000001
1982	1106955
1983	1173110
1984	1243381
1985	1317718
1986	1396683
1987	1477464
1988	1553586
1989	1633439
1990	1717551
1991	1806033
1992	1899246
1993	1997035
1994	2100050
1995	2208426
1996	2322606
1997	2442403
1998	2568611
1999	2701399
2000	2841310
2001	2988118
2002	3142795
2003	3305551
2004	3477052
2005	3657020
2006	3846654
2007	4046208
2008	4256207
2009	4477200
2010	4709770
2011	4954528
2012	5212117
2013	5483216
2014	5768541
2015	6068843
2016	6384915
2017	6717594
2018	7067759
2019	7358544
2020	7655638
2021	7957530
2022	8263315.000000001
2023	8572487