Year	Percent
2006-01-01	36.275
2007-01-01	36.500
2008-01-01	37.150
2009-01-01	37.450
2010-01-01	37.375
2011-01-01	38.475
2012-01-01	37.350
2013-01-01	38.800
2014-01-01	40.775
2015-01-01	41.775
2016-01-01	42.350
2017-01-01	43.200