Year	Percent
2003-01-01	69.975
2004-01-01	69.600
2005-01-01	69.275
2006-01-01	69.000
2007-01-01	69.200
2008-01-01	69.650
2009-01-01	68.425
2010-01-01	68.350
2011-01-01	68.250
2012-01-01	68.100
2013-01-01	67.825
2014-01-01	67.125
2015-01-01	67.100
2016-01-01	67.550
2017-01-01	68.425