Year	Percent
2005-01-01	4.53941316264683
2006-01-01	4.10211434680799
2007-01-01	3.57055698060289
2008-01-01	3.58798061791832
2009-01-01	4.87121169831463
2010-01-01	5.20672492028887
2011-01-01	5.14555059132797
2012-01-01	5.60651790733941