Year	Percent
2000-01-01	38.325
2001-01-01	39.575
2002-01-01	39.250
2003-01-01	39.925
2004-01-01	39.475
2005-01-01	40.800
2006-01-01	40.275
2007-01-01	41.400
2008-01-01	41.825
2009-01-01	42.875
2010-01-01	44.100
2011-01-01	44.325
2012-01-01	43.725
2013-01-01	43.625
2014-01-01	43.925
2015-01-01	43.000
2016-01-01	42.475
2017-01-01	43.125