Year	Percent
2005-01-01	59.825
2006-01-01	60.450
2007-01-01	61.000
2008-01-01	61.125
2009-01-01	59.225
2010-01-01	58.625
2011-01-01	58.425
2012-01-01	57.950
2013-01-01	57.500
2014-01-01	57.850
2015-01-01	58.275
2016-01-01	58.975
2017-01-01	59.650