Year	Percent
2005-01-01	18.725
2006-01-01	17.700
2007-01-01	15.850
2008-01-01	15.550
2009-01-01	18.600
2010-01-01	20.125
2011-01-01	20.950
2012-01-01	22.325
2013-01-01	22.875
2014-01-01	21.425
2015-01-01	19.500
2016-01-01	17.850
2017-01-01	16.100