Year	Percent
2005-01-01	10.03067961156350
2006-01-01	9.33813145184062
2007-01-01	8.38370224903815
2008-01-01	8.19879228172122
2009-01-01	9.63580511503688
2010-01-01	10.22148936689380
2011-01-01	10.37192871128670
2012-01-01	11.47041377014330
2013-01-01	12.06643118554970
2014-01-01	11.78423488703250
2015-01-01	11.03607181365660
2016-01-01	10.36746664533890
2017-01-01	9.43708535562989