Year	Number
1971	244803
1972	266790
1973	274067
1976	317126
1977	414423
1978	424330
1979	451814
1980	463098
1981	479291
1982	480535
1983	480871
1984	485741
1985	495375
1986	523347
1988	558852
1990	563734
1991	576472
1992	580792
1993	637359
1994	681044
1995	710702
1996	757551
1997	786335
1998	821546
1999	827664
2000	831521
2001	828113
2002	852857
2003	875300
2004	884629
2005	890821
2006	891881
2007	891807
2008	900817
2009	908880
2010	916341
2011	900123
2012	883938
2013	878283
2014	870893
2015	850466
2016	827987
2017	808705
2018	786246
2019	770659
2020	760566
2021	756191
2022	738642