Year	Percent
2006-01-01	50.150
2007-01-01	49.800
2008-01-01	49.450
2009-01-01	49.425
2010-01-01	50.225
2011-01-01	48.700
2012-01-01	50.250
2013-01-01	49.000
2014-01-01	46.075
2015-01-01	46.025
2016-01-01	45.800
2017-01-01	44.850