Year	Percent
2003-01-01	13.200
2004-01-01	12.900
2005-01-01	12.725
2006-01-01	12.425
2007-01-01	12.050
2008-01-01	11.500
2009-01-01	11.400
2010-01-01	11.325
2011-01-01	11.750
2012-01-01	11.825
2013-01-01	11.700
2014-01-01	12.150
2015-01-01	12.525
2016-01-01	12.500
2017-01-01	12.575