Year	Percent
2006-01-01	63.725
2007-01-01	63.500
2008-01-01	62.850
2009-01-01	62.550
2010-01-01	62.625
2011-01-01	61.525
2012-01-01	62.650
2013-01-01	61.200
2014-01-01	59.225
2015-01-01	58.225
2016-01-01	57.650
2017-01-01	56.800