Year	Percent
2003-01-01	19.600
2004-01-01	17.000
2005-01-01	16.100
2006-01-01	15.500
2007-01-01	15.250
2008-01-01	16.575
2009-01-01	15.250
2010-01-01	14.325
2011-01-01	14.400
2012-01-01	12.975
2013-01-01	12.450
2014-01-01	11.975
2015-01-01	12.300
2016-01-01	12.825
2017-01-01	12.025