Year	Percent
2003-01-01	13.275
2004-01-01	15.525
2005-01-01	15.675
2006-01-01	15.200
2007-01-01	15.800
2008-01-01	16.600
2009-01-01	16.075
2010-01-01	15.700
2011-01-01	15.325
2012-01-01	14.625
2013-01-01	14.475
2014-01-01	13.075
2015-01-01	12.100
2016-01-01	11.100
2017-01-01	11.300