Year	Percent
1991	0.569
1992	0.336
1993	0.925
1994	0.164
1995	0.806
2003	0.7804
2004	0.5758
2005	0.5177
2006	0.7604
2009	0.6838
2010	0.8679
2011	0.5376
2012	0.7724
2013	0.6671
2014	0.7244
2015	1.4586
2016	0.4531
2017	0.4768