Year	Percent
2001-01-01	9.600
2002-01-01	10.200
2003-01-01	10.075
2004-01-01	10.025
2005-01-01	8.325
2006-01-01	7.475
2007-01-01	7.150
2008-01-01	6.900
2009-01-01	7.150
2010-01-01	7.050
2011-01-01	6.825
2012-01-01	6.475
2013-01-01	6.425
2014-01-01	6.500
2015-01-01	6.625
2016-01-01	6.675
2017-01-01	6.375