Year	Number
1960	588324
1961	597072
1962	606145
1963	617303
1964	633469
1965	654206
1966	677827
1967	703472
1968	729590
1969	756129
1970	783001
1971	809458
1972	835268
1973	861228
1974	887724
1975	913466
1976	937668
1977	960598
1978	980967
1979	994930
1980	1000324
1981	997140
1982	988418
1983	979731
1984	974270
1985	973470
1986	979669
1987	996223
1988	1019426
1989	1048050
1990	1079015
1991	1113230
1992	1153670
1993	1196653
1994	1238683
1995	1278052
1996	1312143
1997	1339171
1998	1358173
1999	1370487
2000	1384733
2001	1405105
2002	1424802
2003	1441816
2004	1454368
2005	1458049
2006	1452324
2007	1436756
2008	1412422
2009	1384269
2010	1358572
2011	1345261
2012	1349270
2013	1366955
2014	1392156
2015	1417828
2016	1442186
2017	1466424
2018	1494228
2019	1527484
2020	1552638
2021	1565548
2022	1585791
2023	1620528