Year	% of total
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0.03198976327575176
1997	0.044385264092321346
1998	0.03450060376056581
1999	0.04866180048661801
2000	0.09671179883945842
2001	0.14018691588785046
2002	0.5283018867924528
2003	1.8113207547169812
2004	1.8554062699936023
2005	1.7937219730941705
2006	1.79922306276835
2007	1.9911968140850975
2008	1.9529768676526356
2009	1.7776979709103968
2010	1.7353251848498568
2011	3.1178208073514933
2012	6.5185665639695145
2013	10.017716218392655
2014	15.75568955456137
2015	16.555214169528284