Year	Percent
2000-01-01	16.100
2001-01-01	16.375
2002-01-01	16.200
2003-01-01	16.225
2004-01-01	16.250
2005-01-01	15.850
2006-01-01	15.450
2007-01-01	15.525
2008-01-01	15.175
2009-01-01	14.950
2010-01-01	15.100
2011-01-01	14.725
2012-01-01	14.475
2013-01-01	14.325
2014-01-01	14.000
2015-01-01	14.175
2016-01-01	13.950
2017-01-01	13.450