Year	Number
1960	41205
1961	43138
1962	44794
1963	46402
1964	48215
1965	50278
1966	52660
1967	55352
1968	58103
1969	60640
1970	62927
1971	65446
1972	68030
1973	70305
1974	72613
1975	75088
1976	77752
1977	80554
1978	83327
1979	85874
1980	88094
1981	89992
1982	91686
1983	92982
1984	93955
1985	94959
1986	95970
1987	96975
1988	97868
1989	98622
1990	99146
1991	99254
1992	98372
1993	96680
1994	95013
1995	93436
1996	92047
1997	90855
1998	89671
1999	88406
2000	87060
2001	85679
2002	84382
2003	83318
2004	82654
2005	82479
2006	82714
2007	83272
2008	84111
2009	85339
2010	87008
2011	88959
2012	90937
2013	92731
2014	94028
2015	95452
2016	97633
2017	100060
2018	102725
2019	105917
2020	109643
2021	113405
2022	117280
2023	122460