Year	Percent
2000-01-01	66.600
2001-01-01	66.775
2002-01-01	67.100
2003-01-01	66.300
2004-01-01	66.025
2005-01-01	65.625
2006-01-01	66.000
2007-01-01	67.725
2008-01-01	68.925
2009-01-01	67.925
2010-01-01	66.625
2011-01-01	66.550
2012-01-01	66.650
2013-01-01	66.100
2014-01-01	60.775
2015-01-01	59.750
2016-01-01	59.625
2017-01-01	59.150