Year	Number
1960	0
1965	0
1970	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	240
1991	2019
1992	6320
1993	11382
1994	21664
1995	33688
1996	64943
1997	120420
1998	182500
1999	295000
2000	1033000
2001	1755000
2002	2312600
2003	2537300
2004	2835500
2005	3649700
2006	4395200
2007	5034582
2008	4554777
2009	4675017
2010	4928352
2011	5115140
2012	4971351
2013	4721015
2014	4461352
2015	4415660
2016	4414347
2017	4315580
2018	4388476
2019	4404652
2020	4375699
2021	4402213
2022	4480469