Year	Percent
2006-01-01	41.625
2007-01-01	40.575
2008-01-01	40.950
2009-01-01	41.075
2010-01-01	42.700
2011-01-01	45.400
2012-01-01	46.325
2013-01-01	45.175
2014-01-01	45.625
2015-01-01	46.275
2016-01-01	49.150
2017-01-01	50.550