Year	Percent
2004	24.12144
2005	30.48019
2006	23.96081
2007	24.3085
2008	28.69944
2009	26.19097
2010	33.25671
2011	42.95421
2012	45.05981
2013	42.2244
2014	39.71084
2015	37.20917
2016	27.54102