Year	Number
1960	432972
1961	448271
1962	463833
1963	479163
1964	494157
1965	508677
1966	523157
1967	538381
1968	554458
1969	571321
1970	589001
1971	607523
1972	625546
1973	644154
1974	664452
1975	685208
1976	706348
1977	727750
1978	749027
1979	770099
1980	791433
1981	812885
1982	834088
1983	854790
1984	874761
1985	893903
1986	912079
1987	929342
1988	945788
1989	961393
1990	976081
1991	989846
1992	1002612
1993	1014267
1994	1024567
1995	1033312
1996	1039393
1997	1042720
1998	1044179
1999	1044574
2000	1044355
2001	1043051
2002	1040729
2003	1037421
2004	1033425
2005	1030476
2006	1028505
2007	1026163
2008	1023769
2009	1021697
2010	1020152
2011	1019248
2012	1019347
2013	1020478
2014	1022345
2015	1024839
2016	1027862
2017	1031204
2018	1034691
2019	1038217
2020	1041904
2021	1045388
2022	1047972
2023	1049492