Year	Percent
2000-01-01	26.800
2001-01-01	26.650
2002-01-01	26.650
2003-01-01	27.525
2004-01-01	27.725
2005-01-01	27.825
2006-01-01	28.175
2007-01-01	27.350
2008-01-01	26.225
2009-01-01	27.375
2010-01-01	28.200
2011-01-01	28.675
2012-01-01	28.575
2013-01-01	28.925
2014-01-01	35.150
2015-01-01	35.050
2016-01-01	35.475
2017-01-01	36.275