Year	Number
1960	1918470
1961	1977675
1962	2035864
1963	2092623
1964	2149339
1965	2207434
1966	2266652
1967	2326010
1968	2385152
1969	2444615
1970	2504474
1971	2565729
1972	2628459
1973	2692240
1974	2753511
1975	2812161
1976	2872818
1977	2936489
1978	3004365
1979	3077440
1980	3156869
1981	3242387
1982	3336051
1983	3433665
1984	3529567
1985	3625021
1986	3721258
1987	3819169
1988	3918672
1989	4018817
1990	4117848
1991	4215650
1992	4311436
1993	4404260
1994	4498498
1995	4594597
1996	4687820
1997	4777766
1998	4866188
1999	4955130
2000	5051905
2001	5148816
2002	5234400
2003	5305260
2004	5364798
2005	5415985
2006	5460110
2007	5497236
2008	5527923
2009	5552208
2010	5570348
2011	5585408
2012	5597970
2013	5608228
2014	5618208
2015	5629320
2016	5637398
2017	5643025
2018	5648770
2019	5650611
2020	5643923
2021	5634189
2022	5623145
2023	5607531