Year	Percent
2005-01-01	18.450
2006-01-01	16.975
2007-01-01	15.250
2008-01-01	15.675
2009-01-01	21.050
2010-01-01	21.850
2011-01-01	22.300
2012-01-01	23.900
2013-01-01	24.325
2014-01-01	22.900
2015-01-01	21.050
2016-01-01	19.400
2017-01-01	17.450