Year	Percent
2003-01-01	68.300
2004-01-01	65.100
2005-01-01	67.800
2006-01-01	70.125
2007-01-01	73.975
2008-01-01	70.050
2009-01-01	56.900
2010-01-01	58.225
2011-01-01	58.600
2012-01-01	62.750
2013-01-01	64.650
2014-01-01	67.550
2015-01-01	69.875
2016-01-01	77.100
2017-01-01	75.025