Year	Percent
2005-01-01	18.675
2006-01-01	17.575
2007-01-01	15.825
2008-01-01	15.750
2009-01-01	18.975
2010-01-01	20.200
2011-01-01	20.875
2012-01-01	22.950
2013-01-01	23.750
2014-01-01	23.225
2015-01-01	21.650
2016-01-01	20.300
2017-01-01	18.150