Year	Percent
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
1995	0.06452
1996	0.15745
1997	0.30775
1998	0.6024
1999	1.12239
2000	2.90267
2001	3.43089
2002	3.38592
2003	3.34519
2004	3.30489
2005	3.26255
2006	4.28993
2007	5.28
2008	6.25
2009	6.15
2010	6
2011	9
2012	16
2013	30
2014	36.74475
2015	37.31205
2016	39.363