Year	Percent
2005-01-01	53.300
2006-01-01	52.375
2007-01-01	51.050
2008-01-01	50.525
2009-01-01	50.825
2010-01-01	51.225
2011-01-01	50.075
2012-01-01	51.975
2013-01-01	51.325
2014-01-01	52.325
2015-01-01	52.950
2016-01-01	52.625
2017-01-01	51.700