Year	Percent
2006	79.19156
2007	71.64914
2008	28.69283
2009	39.58301
2010	26.73591
2011	10.40326
2012	7.96981
2013	8.73891
2014	17.25651
2015	13.68356
2016	12.4608
2017	13.03538