Year	Percent
2005-01-01	88.500
2006-01-01	88.300
2007-01-01	88.900
2008-01-01	89.800
2009-01-01	90.000
2010-01-01	88.325
2011-01-01	89.025
2012-01-01	89.450
2013-01-01	89.200
2014-01-01	89.925
2015-01-01	90.200
2016-01-01	90.575
2017-01-01	90.375