Year	Percent
2006-01-01	8.60907941753872
2007-01-01	8.78657448322547
2008-01-01	9.62327532536684
2009-01-01	12.55167474871720
2010-01-01	10.38584734529200
2011-01-01	8.28297757179813
2012-01-01	7.64343066103076
2013-01-01	7.93829137463678
2014-01-01	9.03425364501873
2015-01-01	9.18434621511605
2016-01-01	9.55451296224444
2017-01-01	9.38103587542410