Year	Percent
2005-01-01	51.100
2006-01-01	52.000
2007-01-01	52.425
2008-01-01	52.525
2009-01-01	52.925
2010-01-01	53.050
2011-01-01	54.000
2012-01-01	54.025
2013-01-01	54.575
2014-01-01	54.750
2015-01-01	54.725
2016-01-01	55.625
2017-01-01	55.875