Year	Percent
2005-01-01	92.600
2006-01-01	92.900
2007-01-01	93.600
2008-01-01	93.700
2009-01-01	92.800
2010-01-01	90.650
2011-01-01	91.575
2012-01-01	91.500
2013-01-01	90.650
2014-01-01	90.800
2015-01-01	91.550
2016-01-01	91.225
2017-01-01	91.100