Year	Percent
2005-01-01	52.425
2006-01-01	53.150
2007-01-01	54.000
2008-01-01	54.725
2009-01-01	54.300
2010-01-01	53.725
2011-01-01	54.775
2012-01-01	53.225
2013-01-01	52.875
2014-01-01	52.025
2015-01-01	50.450
2016-01-01	50.925
2017-01-01	51.275