Year	Percent
2006-01-01	16.475
2007-01-01	17.275
2008-01-01	18.475
2009-01-01	22.850
2010-01-01	19.775
2011-01-01	16.725
2012-01-01	15.700
2013-01-01	16.950
2014-01-01	17.825
2015-01-01	18.525
2016-01-01	19.475
2017-01-01	20.575