Year	Percent
2003-01-01	68.400
2004-01-01	68.100
2005-01-01	68.300
2006-01-01	65.600
2007-01-01	66.275
2008-01-01	67.375
2009-01-01	69.300
2010-01-01	68.750
2011-01-01	67.925
2012-01-01	69.025
2013-01-01	69.625
2014-01-01	69.975
2015-01-01	69.600
2016-01-01	68.500
2017-01-01	67.100