Year	Percent
2003-01-01	63.100
2004-01-01	62.875
2005-01-01	62.550
2006-01-01	62.300
2007-01-01	62.175
2008-01-01	62.125
2009-01-01	62.200
2010-01-01	62.025
2011-01-01	61.675
2012-01-01	61.825
2013-01-01	61.575
2014-01-01	61.000
2015-01-01	60.900
2016-01-01	60.650
2017-01-01	60.500