Year	Percent
2003-01-01	67.775
2004-01-01	67.700
2005-01-01	67.525
2006-01-01	67.375
2007-01-01	67.350
2008-01-01	67.400
2009-01-01	67.600
2010-01-01	67.525
2011-01-01	67.200
2012-01-01	67.500
2013-01-01	67.250
2014-01-01	66.650
2015-01-01	66.575
2016-01-01	66.325
2017-01-01	66.175