Year	Percent
2003-01-01	63.200
2004-01-01	62.500
2005-01-01	62.800
2006-01-01	58.200
2007-01-01	59.125
2008-01-01	61.375
2009-01-01	63.700
2010-01-01	63.350
2011-01-01	62.550
2012-01-01	62.700
2013-01-01	62.750
2014-01-01	62.800
2015-01-01	61.400
2016-01-01	60.425
2017-01-01	60.125