Year	Percent
2003-01-01	58.100
2004-01-01	58.100
2005-01-01	58.050
2006-01-01	57.975
2007-01-01	58.075
2008-01-01	57.750
2009-01-01	57.050
2010-01-01	57.375
2011-01-01	58.725
2012-01-01	59.175
2013-01-01	59.225
2014-01-01	60.275
2015-01-01	59.775
2016-01-01	60.225
2017-01-01	59.700