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	0
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	1500
1997	9000
1998	25181
1999	52607
2000	93386
2001	444711
2002	748780
2003	1074790
2004	1407441
2005	1594367
2006	1887820
2007	2450425
2008	3179036
2009	3257239
2010	3110233
2011	3171283
2012	3357541
2013	3488319
2014	3491188
2015	3443520
2016	3404043
2017	3440085