Year	Percent
2005-01-01	19.425
2006-01-01	18.725
2007-01-01	18.275
2008-01-01	18.000
2009-01-01	17.825
2010-01-01	17.550
2011-01-01	17.325
2012-01-01	17.450
2013-01-01	17.400
2014-01-01	17.475
2015-01-01	17.850
2016-01-01	17.850
2017-01-01	17.625