Year	Percent
2000-01-01	93.925
2001-01-01	94.025
2002-01-01	93.625
2003-01-01	93.450
2004-01-01	93.700
2005-01-01	93.800
2006-01-01	94.150
2007-01-01	94.000
2008-01-01	94.525
2009-01-01	94.425
2010-01-01	93.350
2011-01-01	93.025
2012-01-01	93.000
2013-01-01	92.250
2014-01-01	92.200
2015-01-01	92.075
2016-01-01	91.700
2017-01-01	91.325