Year	Total
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	4886
1990	13921
1991	36136
1992	64438
1993	85186
1994	115691
1995	197314
1996	319474
1997	409740
1998	964248
1999	2260687
2000	3401525
2001	5100783
2002	6244310
2003	7268281
2004	9261385
2005	10569572
2006	12450801
2007	13955202
2008	14796593
2009	16450223
2010	19852242
2011	22315248
2012	23940973
2013	23661339
2014	23680718
2015	23206353
2016	23302603
2017	23013147