Year	Number
1960	569279
1961	568025
1962	567559
1963	563832
1964	560592
1965	554829
1966	550673
1967	548852
1968	542008
1969	535289
1970	531054
1971	528062
1972	527958
1973	528859
1974	530357
1975	531095
1976	527914
1977	526440
1978	523456
1979	518332
1980	515870
1981	515265
1982	519115
1983	524941
1984	528179
1985	530154
1986	526550
1987	523085
1988	516544
1989	511178
1990	508061
1991	526013
1992	526117
1993	526757
1994	528375
1995	530696
1996	533676
1997	537663
1998	539403
1999	539177
2000	539268
2001	539389
2002	546433
2003	554908
2004	560764
2005	564649
2006	569106
2007	576971
2008	584445
2009	592898
2010	602137
2011	609376
2012	610037
2013	612077
2014	619619
2015	629598
2016	641118
2017	651473
2018	659719
2019	666466
2020	677048
2021	675254
2022	671172
2023	679786