Year	Number
1960	62612
1961	62238
1962	61581
1963	60975
1964	60462
1965	59942
1966	59630
1967	59466
1968	59434
1969	59300
1970	58909
1971	58498
1972	58134
1973	57788
1974	57728
1975	57841
1976	58165
1977	58679
1978	59140
1979	59378
1980	59233
1981	58781
1982	58143
1983	57428
1984	57279
1985	57942
1986	58965
1987	60272
1988	62110
1989	64928
1990	68049
1991	71469
1992	75434
1993	79157
1994	82553
1995	85769
1996	88348
1997	90329
1998	92116
1999	93659
2000	95258
2001	97323
2002	99705
2003	102141
2004	104384
2005	105796
2006	106026
2007	104596
2008	100925
2009	95651
2010	90569
2011	87311
2012	86478
2013	87217
2014	88845
2015	91568
2016	94856
2017	98424
2018	102604
2019	107544
2020	112156
2021	117909
2022	124923
2023	132141