Year	Percent
2003-01-01	10.900
2004-01-01	16.900
2005-01-01	13.700
2006-01-01	16.200
2007-01-01	15.125
2008-01-01	17.950
2009-01-01	17.550
2010-01-01	14.325
2011-01-01	16.925
2012-01-01	18.575
2013-01-01	15.800
2014-01-01	22.650
2015-01-01	17.325
2016-01-01	18.675
2017-01-01	15.425