Year	Number
1960	716602
1961	748280
1962	773570
1963	790093
1964	798426
1965	797712
1966	792319
1967	785925
1968	778390
1969	769807
1970	760364
1971	750759
1972	741385
1973	731827
1974	722335
1975	713275
1976	705485
1977	699970
1978	697677
1979	699286
1980	704531
1981	712316
1982	722594
1983	736070
1984	752456
1985	768742
1986	783262
1987	795769
1988	804091
1989	806469
1990	803582
1991	797759
1992	789917
1993	779926
1994	766611
1995	749276
1996	731942
1997	711995
1998	691900
1999	667886
2000	646122
2001	627804
2002	608639
2003	589880
2004	572937
2005	557088
2006	543191
2007	531983
2008	523544
2009	518821
2010	515121
2011	510822
2012	507306
2013	505314
2014	509537
2015	516080
2016	521086
2017	521947
2018	520877
2019	518882
2020	517785
2021	514126
2022	490300
2023	473872