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	2447
1992	7628
1993	15221
1994	26106
1995	45138
1996	54640
1997	65995
1998	78624
1999	144388
2000	366952
2001	597826
2002	1244976
2003	1576360
2004	1837552
2005	1981464
2006	2274650
2007	2684331
2008	2723323
2009	2956061
2010	3181995
2011	2945395
2012	2714938
2013	2846196
2014	3005490
2015	3137213
2016	3267344
2017	3091222