Year	Number
1960	53397
1961	54105
1962	54769
1963	55368
1964	55948
1965	56655
1966	57487
1967	58463
1968	59680
1969	61084
1970	62630
1971	64307
1972	66107
1973	68025
1974	70051
1975	72148
1976	74323
1977	76591
1978	78914
1979	81265
1980	83524
1981	85453
1982	87007
1983	88508
1984	90206
1985	92133
1986	94304
1987	96711
1988	99336
1989	102146
1990	104982
1991	107631
1992	110127
1993	112560
1994	115044
1995	117717
1996	120597
1997	123661
1998	126898
1999	129385
2000	130972
2001	132510
2002	134092
2003	136821
2004	141228
2005	146270
2006	151437
2007	156744
2008	162216
2009	167856
2010	173640
2011	179532
2012	185496
2013	191494
2014	197500
2015	203509
2016	209562
2017	215456
2018	220888
2019	226125
2020	231559
2021	237120
2022	242699
2023	248399