Year	% of total
1990	30.750262006041552
1991	30.482456140350877
1992	29.98610682309355
1993	34.108727492030674
1994	37.96267004112623
1995	25.088524590163935
1996	18.503401360544217
1997	7.564718648271586
1998	7.751937984496124
1999	3.4408602150537635
2000	2.9432750624331074
2001	1.986312802537139
2002	2.105989987916451
2003	3.115056104505108
2004	0
2005	0
2006	0
2007	0
2008	0
2009	0
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0