Year	Number
1960	342780
1961	357772
1962	372922
1963	387720
1964	401802
1965	414667
1966	426509
1967	437995
1968	449958
1969	461577
1970	470786
1971	478501
1972	485821
1973	491567
1974	496056
1975	499908
1976	502717
1977	505154
1978	506694
1979	507768
1980	509441
1981	511322
1982	514165
1983	517339
1984	520634
1985	524067
1986	527305
1987	531375
1988	535580
1989	544783
1990	549774
1991	542088
1992	534820
1993	527781
1994	520862
1995	513882
1996	506287
1997	497541
1998	487461
1999	476169
2000	463893
2001	449302
2002	436602
2003	422981
2004	408644
2005	393304
2006	377402
2007	361172
2008	345320
2009	330432
2010	316995
2011	305438
2012	295475
2013	286777
2014	278775
2015	270950
2016	264404
2017	258326
2018	251691
2019	245027
2020	238887
2021	233398
2022	228501
2023	224245