Year	Number
1960	420603
1961	425748
1962	430962
1963	436241
1964	441591
1965	446992
1966	452467
1967	458009
1968	463626
1969	469297
1970	474627
1971	478627
1972	482666
1973	486728
1974	490830
1975	494967
1976	499144
1977	503345
1978	507587
1979	511865
1980	516183.99999999994
1981	520529
1982	524921
1983	529439
1984	534001
1985	538591
1986	543226
1987	547901
1988	552622
1989	557372
1990	562168
1991	566169
1992	567430
1993	568690
1994	569955
1995	571222
1996	572494
1997	573766
1998	575042
1999	576321
2000	577604
2001	578887
2002	579610
2003	580198
2004	580787
2005	581375
2006	581965
2007	582555
2008	583147
2009	583738
2010	584330
2011	584922
2012	585515
2013	586108
2014	586702
2015	587296
2016	587891
2017	588487
2018	589083
2019	589849
2020	590940
2021	592477
2022	594531
2023	597124