Year	Percent
2000-01-01	17.150
2001-01-01	17.375
2002-01-01	17.625
2003-01-01	17.575
2004-01-01	17.900
2005-01-01	17.925
2006-01-01	17.675
2007-01-01	17.800
2008-01-01	17.550
2009-01-01	18.025
2010-01-01	18.475
2011-01-01	18.500
2012-01-01	18.025
2013-01-01	17.900
2014-01-01	17.850
2015-01-01	17.825
2016-01-01	17.550
2017-01-01	17.650