Year	Number
1960	660230
1961	688745
1962	717420
1963	745316
1964	771925
1965	796052
1966	817875
1967	839008
1968	861076
1969	882497
1970	899332
1971	913306
1972	926505
1973	936772
1974	944750
1975	951662
1976	956827
1977	961394
1978	964386
1979	966642
1980	970111
1981	974211
1982	980546
1983	987991
1984	996239
1985	1005217
1986	1014123
1987	1024879
1988	1036097
1989	1057214
1990	1070213
1991	1058179
1992	1046562
1993	1035046
1994	1023354
1995	1011146
1996	997155
1997	980288
1998	960317
1999	937598
2000	912618
2001	882800
2002	856575
2003	828357
2004	798628
2005	767057
2006	734388
2007	700936
2008	668414
2009	638164
2010	611109
2011	588210
2012	568948
2013	552588
2014	537717
2015	523328
2016	511771
2017	501223
2018	489665
2019	478127
2020	467437
2021	457788
2022	448503
2023	439685