Year	Percent
2001-01-01	41.600
2002-01-01	41.525
2003-01-01	41.600
2004-01-01	41.725
2005-01-01	41.250
2006-01-01	40.750
2007-01-01	40.325
2008-01-01	40.200
2009-01-01	40.625
2010-01-01	41.050
2011-01-01	40.325
2012-01-01	39.925
2013-01-01	39.525
2014-01-01	39.125
2015-01-01	38.675
2016-01-01	38.525
2017-01-01	37.950