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	0
1997	0
1998	0
1999	0
2000	0
2001	0
2002	0
2003	2255
2004	19138
2005	36000
2006	82078
2007	149439
2008	253429
2009	338938
2010	394316
2011	484189
2012	560890
2013	544337
2014	624536
2015	675747
2016	698373
2017	730623