Year	Number
1960	5540976
1961	5541960
1962	5492247
1963	5441341
1964	5390322
1965	5334312
1966	5284252
1967	5275481
1968	5256115
1969	5223145
1970	5191541
1971	5251122
1972	5338874
1973	5431539
1974	5535266
1975	5644413
1976	5744499
1977	5802629
1978	5851095
1979	5899610
1980	5966378
1981	6028261
1982	6059713
1983	6079070
1984	6095759
1985	6110627
1986	6133043
1987	6209133
1988	6284808
1989	6393132
1990	6484711
1991	6555149
1992	6557450
1993	6553895
1994	6550090
1995	6541741
1996	6528757
1997	6477628
1998	6415815
1999	6352957
2000	6297326
2001	6263111
2002	6306962
2003	6338934
2004	6373389
2005	6409210
2006	6444862
2007	6447537
2008	6457290
2009	6471098
2010	6482545
2011	6491486
2012	6547988
2013	6602944
2014	6655226
2015	6691380
2016	6752720
2017	6815656
2018	6891429
2019	6966193
2020	7011720
2021	7015868
2022	7105599
2023	7272932