Year	Number
1973	276004
1974	282145
1975	285111
1976	289282
1977	294678
1978	303575
1979	312658
1980	324725
1981	334426
1982	350994
1983	369703
1984	386892
1985	404893
1986	413395
1987	431116
1988	447393
1989	462580
1990	468620
1991	488852
1992	506892
1993	515297
1994	523338
1995	533797
1996	541737
1999	629372
2000	649597
2001	657804
2002	672920
2003	671049
2004	667835
2005	673005
2006	679666
2007	684478
2008	686777
2009	693877
2010	708340
2011	719916
2012	733102
2013	751930
2014	767729
2015	784752
2016	808672
2017	819462
2018	836774
2019	847418
2020	863262
2021	887760