Year	Percent
2003-01-01	91.875
2004-01-01	91.875
2005-01-01	92.325
2006-01-01	93.275
2007-01-01	93.575
2008-01-01	92.250
2009-01-01	86.125
2010-01-01	86.250
2011-01-01	86.900
2012-01-01	87.300
2013-01-01	88.200
2014-01-01	90.125
2015-01-01	92.075
2016-01-01	93.175
2017-01-01	92.575