Year	Percent
2000-01-01	40.050
2001-01-01	40.250
2002-01-01	41.300
2003-01-01	41.950
2004-01-01	42.050
2005-01-01	41.900
2006-01-01	43.200
2007-01-01	43.525
2008-01-01	43.050
2009-01-01	42.200
2010-01-01	41.475
2011-01-01	41.125
2012-01-01	40.250
2013-01-01	39.850
2014-01-01	38.875
2015-01-01	38.600
2016-01-01	38.025
2017-01-01	37.400