Year	Percent
2005-01-01	55.225
2006-01-01	56.075
2007-01-01	56.800
2008-01-01	57.700
2009-01-01	58.400
2010-01-01	58.700
2011-01-01	59.225
2012-01-01	60.950
2013-01-01	62.525
2014-01-01	63.875
2015-01-01	65.025
2016-01-01	66.575
2017-01-01	67.800