Year	Number
1960	442853
1961	487604
1962	536949
1963	591287
1964	651211
1965	717018
1966	789579
1967	869484
1968	939065
1969	1002218
1970	1069714
1971	1141756
1972	1218759
1973	1300722
1974	1388321
1975	1481820
1976	1581758
1977	1688133
1978	1801823
1979	1923171
1980	2052873.9999999998
1981	2190932
1982	2338484
1983	2495974
1984	2664309
1985	2811896
1986	2967879
1987	3132515
1988	3306530
1989	3489692
1990	3683274
1991	3887595
1992	4103555.0000000005
1993	4330868
1994	4571112
1995	4824684
1996	5092700
1997	5374806
1998	5641396
1999	5885450
2000	6140419
2001	6405687
2002	6682804
2003	6971910
2004	7273947
2005	7589069
2006	7917842
2007	8260859
2008	8618736
2009	8992117
2010	9381673
2011	9788106
2012	10212146
2013	10654556
2014	11116133
2015	11597706
2016	12100142
2017	12624344
2018	13171256
2019	13743278
2020	14342439
2021	14970460
2022	15628085
2023	16315534