Year	% of total
1991	4.82361411087113
1992	1.7948717948717947
1993	17.13796058269066
1994	23.112128146453088
1995	3.159692570452605
1996	4.367301231802911
1997	4.984423676012461
1998	2.649656526005888
1999	3.3085194375516958
2000	0.7818052594171997
2001	0
2002	0.4198740377886634
2003	0.14074595355383532
2004	0.8701957940536621
2005	0.24096385542168677
2006	5.85305105853051
2007	2.1573604060913705
2008	11.259541984732824
2009	5.436241610738255
2010	4.444444444444445
2011	1.8181818181818181
2012	2.1911138161898966
2013	4.432757325319309
2014	0.8678237650200267
2015	2.213541666666667