Year	Percent
2003-01-01	58.425
2004-01-01	58.025
2005-01-01	57.675
2006-01-01	57.425
2007-01-01	57.650
2008-01-01	57.975
2009-01-01	56.800
2010-01-01	56.650
2011-01-01	56.400
2012-01-01	56.025
2013-01-01	55.375
2014-01-01	54.550
2015-01-01	54.325
2016-01-01	54.400
2017-01-01	54.800