Year	Percent
2004	0.26962
2006	0.25372
2007	0.2478
2008	0.2423
2009	0.31544
2010	0.30844
2011	0.30053
2012	0.29314
2013	0.28482
2014	0.27684
2015	0.26955
2016	0.26326
2017	0.38455
2018	0.41173
2019	0.36891
2020	0.36303