Year	Percent
2003-01-01	56.750
2004-01-01	56.675
2005-01-01	56.725
2006-01-01	56.800
2007-01-01	57.525
2008-01-01	58.100
2009-01-01	57.375
2010-01-01	57.300
2011-01-01	57.150
2012-01-01	57.025
2013-01-01	56.725
2014-01-01	56.150
2015-01-01	56.050
2016-01-01	56.100
2017-01-01	56.300