Year	Number
1960	467094
1961	476458
1962	487526
1963	499948
1964	513473
1965	529394
1966	548172
1967	567298
1968	587316
1969	608424
1970	629019
1971	650657
1972	673602
1973	696819
1974	719967
1975	739108
1976	841194
1977	948426
1978	878897
1979	807118
1980	829181
1981	851731
1982	866302
1983	877782
1984	895309
1985	914396
1986	938480
1987	964574
1988	987383
1989	1008405
1990	1027174
1991	1050544
1992	1079614
1993	1108364
1994	1136973
1995	1167527
1996	1200131
1997	1233272
1998	1267005
1999	1301852
2000	1336937
2001	1371558
2002	1402992
2003	1435544
2004	1473519
2005	1511999
2006	1552717
2007	1597099
2008	1637194
2009	1671180
2010	1696898
2011	1722288
2012	1774627
2013	1951242
2014	2159164
2015	2175292
2016	2071914
2017	1968222
2018	1865275
2019	1763734
2020	1703563
2021	1682855
2022	1651017
2023	1605975