Year	Number
1960	46047
1961	47914
1962	50215
1963	52556
1964	54833
1965	56993
1966	59035
1967	61010
1968	62929
1969	64801
1970	66505
1971	67702
1972	68354
1973	68801
1974	69230
1975	70050
1976	71180
1977	72148
1978	72971
1979	73656
1980	74392
1981	75374
1982	76494
1983	77641
1984	78802
1985	79995
1986	81228
1987	82493
1988	83780
1989	85117
1990	86859
1991	88922
1992	90870
1993	92623
1994	94102
1995	95270
1996	96178
1997	96914
1998	97501
1999	97945
2000	97905
2001	97307
2002	96434
2003	95304
2004	93967
2005	92490
2006	90910
2007	89237
2008	87494
2009	85712
2010	84432
2011	83820
2012	83234
2013	82519
2014	81845
2015	81280
2016	80940
2017	80834
2018	80663
2019	80325
2020	79885
2021	79344
2022	78756
2023	78159