Year	Number
1967	178308
1968	184148
1969	190438
1970	196652
1971	202463
1972	207786
1973	213047
1974	218581
1975	224272
1976	229904
1977	236137
1978	239832
1979	242593
1980	244340
1981	243178
1982	246607
1983	252332
1984	256181
1985	260252
1986	264019
1987	266838
1988	269554
1989	273005
1990	277099
1991	280274
1992	282299
1993	282735
1994	280968
1995	278137
1996	275474
1997	272201
1998	266679
1999	261001
2000	255351
2001	249431
2002	243180
2003	234672
2004	225807
2005	217864
2006	209468
2007	201309
2008	192773
2009	183601
2010	175540
2011	169000
2012	162198
2013	155194
2014	149922
2015	146579
2016	143883
2017	141179
2018	139027
2019	138159
2020	136688
2021	134477
2022	131984