Year	Percent
2001-01-01	27.100
2002-01-01	27.450
2003-01-01	27.650
2004-01-01	27.875
2005-01-01	26.700
2006-01-01	26.200
2007-01-01	26.025
2008-01-01	25.850
2009-01-01	26.475
2010-01-01	26.100
2011-01-01	26.075
2012-01-01	26.050
2013-01-01	25.750
2014-01-01	25.275
2015-01-01	25.575
2016-01-01	25.550
2017-01-01	24.875