Year	Percent
2003-01-01	17.800
2004-01-01	19.200
2005-01-01	19.450
2006-01-01	20.425
2007-01-01	18.325
2008-01-01	18.525
2009-01-01	24.050
2010-01-01	22.175
2011-01-01	21.375
2012-01-01	24.050
2013-01-01	23.800
2014-01-01	25.150
2015-01-01	25.800
2016-01-01	25.075
2017-01-01	23.150