Year	Number
1960	85525
1961	86115
1962	86704
1963	87262
1964	87790
1965	88282
1966	88753
1967	89205
1968	89629
1969	90062
1970	90645
1971	91630
1972	92684
1973	93774
1974	94879
1975	96007
1976	97153
1977	98320
1978	99515
1979	100706
1980	101689
1981	101436
1982	101117
1983	100755
1984	100357
1985	99904
1986	99379
1987	98790
1988	98130
1989	97433
1990	96739
1991	95994
1992	95349
1993	94697
1994	94017
1995	93291
1996	92529
1997	91749
1998	90964
1999	90219
2000	89526
2001	89244
2002	89079
2003	88901
2004	88706
2005	88499
2006	88283
2007	88086
2008	87941
2009	87786
2010	87550
2011	87329
2012	87148
2013	87016
2014	86933
2015	86898
2016	86919
2017	86992
2018	87114
2019	87298
2020	87551
2021	87864
2022	88219
2023	88617