Year	Number
1970	3286052
1971	3466262
1972	3570446
1973	3733193
1974	3791543
1975	3911244
1976	4058044
1977	4160527
1978	4265598
1979	4337607
1980	4168200
1981	4217800
1982	3930303
1983	3983141
1984	4009423
1985	4039533
1986	4002543
1987	4114954
1988	4160580
1989	4205657
1990	4246658
1991	4310970
1992	4525959
1993	4599132
1994	4648335
1995	4692614
1996	4916934
1998	5136274
1999	5162260
2000	5221018
2001	5131463
2002	5193055
2004	5259033
2005	5298257
2006	5296190
2007	5292476
2008	5285523
2009	5299258
2010	5084972
2011	4924346
2012	4742456
2013	4708466
2014	4542644
2015	4479218
2016	4448238
2017	4351705
2018	4303833
2019	4263988
2020	4193542
2021	4190726
2022	4140463