Year	Percent
2000-01-01	70.750
2001-01-01	70.775
2002-01-01	70.600
2003-01-01	69.550
2004-01-01	69.250
2005-01-01	69.050
2006-01-01	69.425
2007-01-01	70.800
2008-01-01	71.900
2009-01-01	70.400
2010-01-01	69.250
2011-01-01	69.025
2012-01-01	69.200
2013-01-01	68.650
2014-01-01	62.600
2015-01-01	62.175
2016-01-01	61.525
2017-01-01	61.075