Year	Number
1960	28582
1961	29310
1962	30080
1963	30886
1964	31729
1965	32613
1966	33534
1967	34489
1968	35491
1969	36532
1970	37563
1971	38794
1972	40252
1973	41736
1974	43292
1975	44885
1976	46512
1977	48201
1978	49915
1979	51643
1980	53385
1981	55138
1982	56895
1983	58658
1984	60413
1985	62133
1986	63843
1987	65565
1988	67279
1989	68998
1990	70752
1991	72531
1992	74312
1993	76109
1994	77946
1995	79829
1996	81726
1997	83594
1998	85439
1999	87227
2000	88918
2001	90541
2002	92140
2003	93757
2004	95393
2005	97062
2006	98811
2007	100636
2008	102485
2009	104401
2010	106458
2011	108704
2012	111154
2013	113741
2014	116378
2015	119015
2016	121619
2017	124163
2018	126641
2019	129070
2020	131535
2021	133984
2022	136390
2023	138760