Year	Percent
2005-01-01	78.025
2006-01-01	78.250
2007-01-01	78.450
2008-01-01	78.575
2009-01-01	78.275
2010-01-01	78.075
2011-01-01	77.925
2012-01-01	78.175
2013-01-01	78.100
2014-01-01	78.025
2015-01-01	78.125
2016-01-01	78.275
2017-01-01	78.475