Year	Number
1960	53883
1961	54550
1962	55389
1963	56334
1964	57307
1965	58243
1966	59125
1967	59998
1968	60911
1969	61847
1970	62767
1971	63632
1972	64479
1973	65378
1974	66285
1975	67153
1976	67984
1977	68812
1978	69693
1979	70823
1980	70940
1981	71120
1982	74199
1983	77260
1984	77643
1985	77983
1986	79797
1987	81671
1988	83295
1989	84986
1990	86040
1991	87815
1992	90047
1993	90475
1994	90939
1995	93473
1996	95934
1997	97339
1998	98762
1999	100278
2000	101769
2001	103242
2002	105007
2003	107509
2004	110486
2005	112659
2006	114149
2007	115468
2008	116976
2009	118733
2010	120455
2011	122466
2012	124565
2013	126887
2014	128865
2015	131042
2016	134809
2017	139350
2018	144345
2019	149517
2020	153887
2021	157478
2022	161077
2023	165624