Year	Percent
2005-01-01	85.175
2006-01-01	86.000
2007-01-01	86.750
2008-01-01	86.800
2009-01-01	84.575
2010-01-01	84.050
2011-01-01	83.950
2012-01-01	83.275
2013-01-01	82.600
2014-01-01	83.125
2015-01-01	83.775
2016-01-01	84.550
2017-01-01	85.500