Year	Percent
2005-01-01	16.350
2006-01-01	15.850
2007-01-01	15.750
2008-01-01	15.375
2009-01-01	15.325
2010-01-01	15.025
2011-01-01	14.975
2012-01-01	14.650
2013-01-01	14.625
2014-01-01	14.525
2015-01-01	14.600
2016-01-01	14.500
2017-01-01	14.350