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	5500
2001	22000
2002	34200
2003	65000
2004	123000
2005	210000
2006	466088
2007	918356
2008	1600000
2009	2281320
2010	2875304
2011	3665661
2012	4402282
2013	4561243
2014	5251560
2015	5465797
2016	5585709