Year	Number
1960	84553
1961	84855
1962	84499
1963	84118
1964	83781
1965	83431
1966	82921
1967	82275
1968	81798
1969	81696
1970	82092
1971	82778
1972	83383
1973	83741
1974	84285
1975	85201
1976	86555
1977	88697
1978	91237
1979	92924
1980	93416
1981	93304
1982	93519
1983	94159
1984	93966
1985	92393
1986	90009
1987	87976
1988	86076
1989	82953
1990	79890
1991	77731
1992	75403
1993	72790
1994	70353
1995	68632
1996	67095
1997	65561
1998	64549
1999	63778
2000	62914
2001	62596
2002	62302
2003	61453
2004	60431
2005	59352
2006	58736
2007	58230
2008	57617
2009	57185
2010	56398
2011	54633
2012	53752
2013	53878
2014	53617
2015	52981
2016	52654
2017	52946
2018	53567
2019	54158
2020	54508
2021	54538
2022	54128