Year	Percent
2005-01-01	30.250
2006-01-01	29.800
2007-01-01	29.625
2008-01-01	29.275
2009-01-01	29.175
2010-01-01	29.025
2011-01-01	28.875
2012-01-01	28.325
2013-01-01	28.025
2014-01-01	27.700
2015-01-01	27.475
2016-01-01	27.075
2017-01-01	26.650