Year	Percent
2003-01-01	33.500
2004-01-01	29.600
2005-01-01	27.800
2006-01-01	26.200
2007-01-01	25.300
2008-01-01	27.050
2009-01-01	24.725
2010-01-01	23.600
2011-01-01	22.875
2012-01-01	20.825
2013-01-01	19.475
2014-01-01	19.050
2015-01-01	18.675
2016-01-01	18.975
2017-01-01	16.000