Year	Percent
2006-01-01	80.700
2007-01-01	80.700
2008-01-01	80.225
2009-01-01	77.925
2010-01-01	80.450
2011-01-01	82.700
2012-01-01	82.775
2013-01-01	83.250
2014-01-01	82.800
2015-01-01	83.225
2016-01-01	83.175
2017-01-01	83.800