Year	Number
1960	78135
1961	79646
1962	81125
1963	82549
1964	83970
1965	85180
1966	86105
1967	87218
1968	88511
1969	89638
1970	90476
1971	90812
1972	90606
1973	90086
1974	89435
1975	88563
1976	88191
1977	88137
1978	86863
1979	84521
1980	81919
1981	77944
1982	71889
1983	64436
1984	56797
1985	50155
1986	44489
1987	40160
1988	37241
1989	35321
1990	33926
1991	33123
1992	32954
1993	32518
1994	31531
1995	29531
1996	26929
1997	24729
1998	22975
1999	21848
2000	21211
2001	20595
2002	20028
2003	19756
2004	19735
2005	19747
2006	19776
2007	19921
2008	20158
2009	20377
2010	20534
2011	20692
2012	21025
2013	21236
2014	21357
2015	21545
2016	21532
2017	21292
2018	20798
2019	20109
2020	19292
2021	18384
2022	17426