Year	Number
1960	21265
1961	21903
1962	22569
1963	23257
1964	23959
1965	24668
1966	25386
1967	26108
1968	26844
1969	27601
1970	28372
1971	29158
1972	29957
1973	30772
1974	31608
1975	32294
1976	32798
1977	33281
1978	33734
1979	34083
1980	34347
1981	34633
1982	35205
1983	36206
1984	37744
1985	39601
1986	41359
1987	43062
1988	44557
1989	45630
1990	46525
1991	47514
1992	48720
1993	50102
1994	51305
1995	52296
1996	53201
1997	53809
1998	54269
1999	54740
2000	55607
2001	56592
2002	57263
2003	58129
2004	59050
2005	59914
2006	60805
2007	61671
2008	62352
2009	63354
2010	64585
2011	65662
2012	66807
2013	68024
2014	69421
2015	70982
2016	72821
2017	74983
2018	77418
2019	80142
2020	83109
2021	86163
2022	89620
2023	93614