Year	Number
1960	2014800
1961	2042844
1962	2085276
1963	2124986
1964	2177781
1965	2240506
1966	2307852
1967	2380098
1968	2444921
1969	2500245
1970	2556604
1971	2615746
1972	2670233
1973	2722579
1974	2774013
1975	2822503
1976	2862418
1977	2905507
1978	2953414
1979	2994328
1980	2994729
1981	2940396
1982	2876139
1983	2825187
1984	2793752
1985	2825115
1986	2906426
1987	2985006
1988	3061045
1989	3135453
1990	3211301
1991	3304555
1992	3385595
1993	3464670
1994	3542807
1995	3623493
1996	3702577
1997	3777784
1998	3845260
1999	3910475
2000	3977547
2001	4041711
2002	4104241
2003	4161049
2004	4221656
2005	4278539
2006	4319104
2007	4364494
2008	4427151
2009	4496927
2010	4569453
2011	4689721
2012	4862315
2013	5044964
2014	5227834
2015	5400260
2016	5557411
2017	5709234
2018	5858528
2019	6000752
2020	6125141
2021	6241106
2022	6370166
2023	6505440