Year	Percent
2000-01-01	33.500
2001-01-01	33.725
2002-01-01	34.575
2003-01-01	35.275
2004-01-01	35.000
2005-01-01	34.275
2006-01-01	34.950
2007-01-01	34.975
2008-01-01	33.975
2009-01-01	33.125
2010-01-01	32.850
2011-01-01	32.450
2012-01-01	32.050
2013-01-01	31.775
2014-01-01	31.425
2015-01-01	31.475
2016-01-01	31.025
2017-01-01	30.625