Year	Number
1960	280800
1961	286073
1962	290093
1963	292823
1964	294242
1965	295268
1966	295327
1967	294567
1968	295657
1969	297749
1970	300083
1971	303507
1972	306596
1973	308449
1974	309140
1975	309370
1976	310220
1977	312009
1978	314385
1979	316808
1980	319823
1981	323902
1982	328396
1983	332528
1984	335652
1985	338108
1986	340766
1987	343935
1988	347150
1989	349407
1990	349228
1991	345175
1992	334398
1993	320250
1994	308180
1995	297392
1996	286814
1997	276591
1998	266232
1999	255647
2000	246351
2001	238140
2002	229659
2003	220925
2004	212735
2005	206033
2006	201480
2007	199156
2008	199067
2009	200655
2010	202857
2011	204858
2012	206225
2013	207437
2014	208827
2015	210657
2016	212526
2017	214415
2018	216326
2019	218070
2020	218916
2021	219196
2022	221293
2023	222207