Year	% of total
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	0
2004	0
2005	0
2006	0
2007	0.020959966464053657
2008	0.037921880925293895
2009	0.03591309032142216
2010	0.03017956843217142
2011	0.03281916639317361
2012	0.03243067942273391
2013	0.016105653084232566
2014	0
2015	0