Year	Percent
2005-01-01	56.075
2006-01-01	57.175
2007-01-01	58.175
2008-01-01	58.850
2009-01-01	58.375
2010-01-01	58.200
2011-01-01	58.425
2012-01-01	58.575
2013-01-01	58.775
2014-01-01	59.550
2015-01-01	60.375
2016-01-01	61.325
2017-01-01	62.425