Year	Percent
2005-01-01	83.900
2006-01-01	84.700
2007-01-01	85.600
2008-01-01	85.400
2009-01-01	84.400
2010-01-01	83.225
2011-01-01	84.050
2012-01-01	83.900
2013-01-01	83.450
2014-01-01	83.350
2015-01-01	83.575
2016-01-01	83.700
2017-01-01	84.275