Year	Percent
2006-01-01	49.000
2007-01-01	49.075
2008-01-01	49.825
2009-01-01	50.775
2010-01-01	51.925
2011-01-01	53.200
2012-01-01	53.350
2013-01-01	54.375
2014-01-01	55.100
2015-01-01	56.025
2016-01-01	56.950
2017-01-01	57.975