Year	Number
1960	577691
1961	599659
1962	620160
1963	641047
1964	666773
1965	693858
1966	720930
1967	746559
1968	771985
1969	798088
1970	824891
1971	851651
1972	876508
1973	903757
1974	933996
1975	962675
1976	990202
1977	1014693
1978	1034599
1979	1055777
1980	1073288
1981	1084471
1982	1091593
1983	1096148
1984	1107192
1985	1125170
1986	1150184
1987	1178786
1988	1206041
1989	1220422
1990	1227271
1991	1241255
1992	1253556
1993	1268873
1994	1287982
1995	1304031
1996	1317122
1997	1327820
1998	1339413
1999	1355851
2000	1371852
2001	1363803
2002	1350344
2003	1351536
2004	1351520
2005	1350605
2006	1349382
2007	1349076
2008	1350219
2009	1354660
2010	1363556
2011	1380650
2012	1402116
2013	1425387
2014	1450544
2015	1472037
2016	1487960
2017	1500626
2018	1515261
2019	1531179
2020	1543867
2021	1542066
2022	1446752
2023	1434237