Year	Percent
2001-01-01	12.025
2002-01-01	12.300
2003-01-01	12.300
2004-01-01	12.325
2005-01-01	11.175
2006-01-01	10.575
2007-01-01	9.975
2008-01-01	9.600
2009-01-01	9.950
2010-01-01	10.175
2011-01-01	9.725
2012-01-01	9.425
2013-01-01	9.125
2014-01-01	9.200
2015-01-01	9.100
2016-01-01	9.050
2017-01-01	8.750