Year	Percent
2005-01-01	8.19327602404479
2006-01-01	8.08053287656067
2007-01-01	8.24005394293390
2008-01-01	8.75475416206920
2009-01-01	11.23954197487290
2010-01-01	10.52170058658450
2011-01-01	10.80282078339250
2012-01-01	10.37118801471420
2013-01-01	10.82009280520920
2014-01-01	10.79170648302850
2015-01-01	10.04798677558900
2016-01-01	8.77852577649573
2017-01-01	8.00339548443789