Year	Percent
2000-01-01	45.650
2001-01-01	44.750
2002-01-01	43.725
2003-01-01	43.425
2004-01-01	43.075
2005-01-01	42.550
2006-01-01	41.925
2007-01-01	40.775
2008-01-01	40.100
2009-01-01	39.575
2010-01-01	41.100
2011-01-01	41.250
2012-01-01	40.700
2013-01-01	40.750
2014-01-01	41.550
2015-01-01	41.225
2016-01-01	41.325
2017-01-01	41.200