Year	Number
1960	29580
1961	31081
1962	32578
1963	34093
1964	35661
1965	37294
1966	38981
1967	40727
1968	42526
1969	44316
1970	46076
1971	47832
1972	49558
1973	51252
1974	52919
1975	54559
1976	56135
1977	57665
1978	59220
1979	60817
1980	62515
1981	64336
1982	66237
1983	68190
1984	70185
1985	72219
1986	74276
1987	76334
1988	78402
1989	80509
1990	82621
1991	84745
1992	86908
1993	89069
1994	91148
1995	93133
1996	95064
1997	97508
1998	100432
1999	103231
2000	105941
2001	108616
2002	111194
2003	113552
2004	115717
2005	117762
2006	119978
2007	122614
2008	125566
2009	128794
2010	132318
2011	136085
2012	140034
2013	144147
2014	148461
2015	151017
2016	152328
2017	154769
2018	158129
2019	162470
2020	167768
2021	173495
2022	179952
2023	187452