Year	Number
1960	519177
1961	533949
1962	549163
1963	564810
1964	580926
1965	597455
1966	614478
1967	631986
1968	662915
1969	695267
1970	729246
1971	764885
1972	802318
1973	841473
1974	882597
1975	925730
1976	971036
1977	1018424
1978	1068196
1979	1120400
1980	1175232
1981	1232586
1982	1292824
1983	1356006
1984	1420498
1985	1476357
1986	1534495
1987	1594922
1988	1657818
1989	1723009
1990	1790860
1991	1861383
1992	1934786
1993	2010869
1994	2090056
1995	2144292
1996	2188930
1997	2234371
1998	2280820
1999	2328234
2000	2376701
2001	2426040
2002	2476473
2003	2527954
2004	2580579
2005	2634150
2006	2688909
2007	2750472
2008	2870660
2009	2995747
2010	3126469
2011	3262895
2012	3405475
2013	3553866
2014	3708942
2015	3870785
2016	4039927
2017	4215965
2018	4399674
2019	4591983
2020	4793699
2021	5005524
2022	5227794
2023	5460591