Year	Percent
2006-01-01	46.825
2007-01-01	46.900
2008-01-01	47.700
2009-01-01	48.675
2010-01-01	49.825
2011-01-01	51.050
2012-01-01	51.150
2013-01-01	52.075
2014-01-01	52.575
2015-01-01	53.350
2016-01-01	54.200
2017-01-01	54.975