Year	Percent
2005-01-01	51.100
2006-01-01	52.475
2007-01-01	53.700
2008-01-01	54.550
2009-01-01	55.225
2010-01-01	56.175
2011-01-01	58.000
2012-01-01	58.475
2013-01-01	59.550
2014-01-01	60.225
2015-01-01	60.750
2016-01-01	62.000
2017-01-01	62.725