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	2500
1998	3000
1999	4000
2000	7500
2001	8173
2002	8173
2003	9187
2004	50100
2005	105000
2006	216868
2007	381670
2008	1135150
2009	2132890
2010	3197624
2011	5300000
2012	5900000
2013	6125300
2014	7206100
2015	7842000
2016	8575000