Year	Percent
2005-01-01	91.700
2006-01-01	91.975
2007-01-01	91.875
2008-01-01	91.950
2009-01-01	91.725
2010-01-01	91.775
2011-01-01	91.625
2012-01-01	91.775
2013-01-01	91.525
2014-01-01	91.475
2015-01-01	91.425
2016-01-01	91.400
2017-01-01	91.600