Year	Number
1960	78465
1961	78120
1962	78251
1963	78618
1964	79325
1965	80584
1966	82139
1967	83501
1968	84662
1969	85633
1970	86339
1971	86946
1972	87266
1973	86983
1974	86507
1975	85844
1976	85143
1977	84241
1978	83335
1979	82634
1980	82037
1981	81750
1982	81709
1983	81734
1984	82284
1985	83413
1986	85260
1987	87850
1988	91061
1989	94901
1990	99164
1991	103536
1992	107495
1993	110822
1994	113238
1995	115043
1996	116172
1997	116534
1998	116302
1999	115180
2000	113018
2001	110348
2002	106958
2003	102857
2004	98597
2005	94171
2006	90608
2007	87513
2008	83234
2009	79724
2010	77624
2011	75879
2012	74498
2013	72333
2014	70299
2015	68425
2016	66841
2017	65780
2018	64246
2019	62921
2020	62224
2021	60916
2022	60282