Year	Percent
2005-01-01	53.775
2006-01-01	54.525
2007-01-01	55.550
2008-01-01	56.375
2009-01-01	57.350
2010-01-01	58.100
2011-01-01	58.775
2012-01-01	60.675
2013-01-01	62.375
2014-01-01	63.775
2015-01-01	65.200
2016-01-01	66.900
2017-01-01	68.075