Year	Percent
2005	0.97402
2006	0.80691
2007	0.54992
2008	0.44923
2009	0.52148
2011	0.3586
2012	0.32803
2013	0.42187
2014	0.35699
2015	0.47336
2016	0.58623
2017	0.58112