Year	Number
1960	156699
1961	160856
1962	166357
1963	179370
1964	201715
1965	226770
1966	254977
1967	286694
1968	322408
1969	362454
1970	407540
1971	458234
1972	515317
1973	579324
1974	651386
1975	710374
1976	768894
1977	832054
1978	900500
1979	974576
1980	1054860
1981	1141510
1982	1235412
1983	1337038
1984	1447182
1985	1566059
1986	1694884
1987	1834307
1988	1985416
1989	2148505
1990	2325243
1991	2516520
1992	2723829
1993	2844967
1994	2938424
1995	3034951
1996	3134789
1997	3237622
1998	3343978
1999	3453827
2000	3567444
2001	3684470
2002	3805504
2003	3930515
2004	4059812
2005	4252232
2006	4470513
2007	4700000
2008	4867609
2009	5040709
2010	5220217
2011	5406118
2012	5598638
2013	5798015
2014	6004492
2015	6218322
2016	6439767
2017	6669098
2018	6906595
2019	7070665
2020	7231447
2021	7387817
2022	7538200
2023	7682430