Year	Percent
2000-01-01	62.175
2001-01-01	60.250
2002-01-01	62.200
2003-01-01	63.550
2004-01-01	64.100
2005-01-01	64.300
2006-01-01	65.825
2007-01-01	67.025
2008-01-01	66.950
2009-01-01	66.200
2010-01-01	65.425
2011-01-01	66.475
2012-01-01	66.425
2013-01-01	66.700
2014-01-01	66.175
2015-01-01	67.175
2016-01-01	65.475
2017-01-01	65.200