Year	Number
1960	557749
1961	562234
1962	565371
1963	567912
1964	569842
1965	571023
1966	571290
1967	570599
1968	568978
1969	566487
1970	563321
1971	560483
1972	558302
1973	556202
1974	553913
1975	551346
1976	548465
1977	545498
1978	542692
1979	540038
1980	538166
1981	543146
1982	547871
1983	552407
1984	556582
1985	561439
1986	566962
1987	571722
1988	575556
1989	578598
1990	581028
1991	583132
1992	585019
1993	586507
1994	587488
1995	587997
1996	588103
1997	587825
1998	587367
1999	586947
2000	587435
2001	592744
2002	598550
2003	604454
2004	610418
2005	616536
2006	622657
2007	628865
2008	635090
2009	641563
2010	648384
2011	655538
2012	662679
2013	669507
2014	675819
2015	681625
2016	686912
2017	691914
2018	704445
2019	711537
2020	710280
2021	713019
2022	714385
2023	714682