Year	Percent
2005-01-01	59.875
2006-01-01	60.375
2007-01-01	60.900
2008-01-01	60.725
2009-01-01	58.675
2010-01-01	57.975
2011-01-01	57.775
2012-01-01	56.975
2013-01-01	56.225
2014-01-01	56.225
2015-01-01	56.525
2016-01-01	57.275
2017-01-01	57.925