Year	Number
1960	9912188
1961	10011565
1962	10003429
1963	9962733
1964	9908481
1965	9785744
1966	9599057
1967	9417249
1968	9228431
1969	9026027
1970	8767066
1971	8527900
1972	8373292
1973	8252116
1974	8184617
1975	8175628
1976	8226442
1977	8309553
1978	8383214
1979	8482082
1980	8627792
1981	8783277
1982	8952575
1983	9141938
1984	9326261
1985	9480889
1986	9589538
1987	9641003
1988	9627757
1989	9575610
1990	9501666
1991	9405175
1992	9290462
1993	9151130
1994	8986008
1995	8786817
1996	8566883
1997	8327712
1998	8051834
1999	7761410
2000	7394828
2001	7128495
2002	6891281
2003	6667579
2004	6461606
2005	6275690
2006	6108680
2007	5976694
2008	5892884
2009	5844464
2010	5793482
2011	5764799
2012	5736517
2013	5713238
2014	5696884
2015	5688308
2016	5693104
2017	5727858
2018	5773407
2019	5805897
2020	5816751
2021	5801467
2022	5578684
2023	5482156