Year	Number
1960	1937413
1961	2012544
1962	2087620
1963	2162925
1964	2236916
1965	2308870
1966	2378940
1967	2446072
1968	2510433
1969	2572176
1970	2631390
1971	2688027
1972	2742004
1973	2794211
1974	2846559
1975	2900850
1976	2957209
1977	3014975
1978	3074041
1979	3134320
1980	3195321
1981	3256445
1982	3317243
1983	3377766
1984	3438728
1985	3500537
1986	3565013
1987	3631930
1988	3698457
1989	3763329
1990	3825769
1991	3884968
1992	3940016
1993	3990338
1994	4035764
1995	4076996
1996	4115437
1997	4152189
1998	4187468
1999	4220866
2000	4252037
2001	4278769
2002	4300879
2003	4320310
2004	4337753
2005	4354146
2006	4369603
2007	4384021
2008	4397550
2009	4410793
2010	4424134
2011	4436366
2012	4446446
2013	4454004
2014	4458368
2015	4459105
2016	4450956
2017	4418025
2018	4346047
2019	4253211
2020	4165083
2021	4077039
2022	4004655
2023	3956254