Year	Number
1960	484952
1961	493627
1962	502469
1963	511470
1964	517437
1965	523394
1966	529428
1967	535531
1968	541713
1969	547950
1970	554267
1971	560657
1972	564326
1973	566952
1974	569595
1975	572250
1976	574921
1977	577597
1978	580289
1979	582994
1980	585715
1981	588456
1982	591252
1983	594061
1984	596887
1985	599719
1986	602568
1987	605431
1988	608311
1989	611197
1990	614100
1991	617018
1992	619953
1993	622894
1994	625854
1995	628827
1996	631818
1997	634816
1998	637832
1999	640862
2000	643911
2001	646966
2002	638910
2003	630455
2004	622101
2005	613880
2006	605756
2007	597740
2008	589820
2009	582025
2010	574323
2011	566723
2012	562985
2013	568957
2014	575000
2015	581107
2016	587279
2017	593517
2018	599821
2019	606158
2020	612535
2021	619001
2022	625637
2023	632543