Year	Number
1960	141326
1961	144686
1962	147987
1963	151394
1964	154812
1965	158077
1966	161107
1967	163912
1968	166562
1969	169115
1970	171572
1971	174315
1972	177426
1973	180708
1974	184248
1975	188036
1976	192062
1977	196241
1978	200395
1979	204244
1980	207491
1981	210624
1982	213744
1983	216308
1984	218282
1985	219654
1986	220445
1987	220717
1988	220518
1989	219884
1990	218864
1991	218613
1992	219523
1993	220679
1994	221779
1995	222685
1996	223390
1997	223916
1998	224333
1999	224706
2000	225059
2001	225442
2002	225936
2003	226588
2004	227379
2005	228262
2006	229392
2007	230707
2008	231913
2009	232947
2010	233762
2011	234287
2012	235714
2013	237220
2014	237750
2015	238269
2016	238722
2017	239080
2018	250081
2019	255482
2020	252015
2021	254861
2022	256639
2023	258670