Year	Number
1960	185764
1961	199301
1962	213855
1963	229479
1964	246277
1965	264263
1966	283601
1967	304364
1968	333627
1969	367005
1970	403780
1971	444244
1972	488834
1973	537765
1974	591678
1975	651005
1976	716383
1977	788129
1978	867186
1979	922266
1980	974906
1981	1030411
1982	1089179
1983	1151317
1984	1217115
1985	1286497
1986	1359962
1987	1437644
1988	1519904
1989	1592299
1990	1665525
1991	1742157
1992	1822467
1993	1906286
1994	1994128
1995	2086065
1996	2182425
1997	2283007
1998	2388430
1999	2498778
2000	2614452
2001	2735204
2002	2861783
2003	3024943
2004	3200793
2005	3386345
2006	3582940
2007	3790955
2008	4011368
2009	4243946
2010	4490367
2011	4751106
2012	5027386
2013	5318918
2014	5627368
2015	5953717
2016	6299006
2017	6664335
2018	7050867
2019	7429015
2020	7822080
2021	8228903
2022	8650133
2023	9086619