Year	Percent
2000-01-01	60.500
2001-01-01	61.175
2002-01-01	60.925
2003-01-01	60.950
2004-01-01	61.625
2005-01-01	62.925
2006-01-01	64.075
2007-01-01	67.125
2008-01-01	65.150
2009-01-01	59.425
2010-01-01	56.825
2011-01-01	55.800
2012-01-01	55.550
2013-01-01	57.025
2014-01-01	58.150
2015-01-01	59.575
2016-01-01	61.050
2017-01-01	62.000