Year	Percent
2006-01-01	43.650
2007-01-01	42.450
2008-01-01	43.375
2009-01-01	44.325
2010-01-01	45.650
2011-01-01	48.050
2012-01-01	48.625
2013-01-01	47.850
2014-01-01	49.250
2015-01-01	50.275
2016-01-01	53.025
2017-01-01	54.800