Year	Percent
2005-01-01	66.600
2006-01-01	70.200
2007-01-01	70.200
2008-01-01	68.100
2009-01-01	66.100
2010-01-01	68.825
2011-01-01	69.175
2012-01-01	68.900
2013-01-01	68.900
2014-01-01	68.350
2015-01-01	66.775
2016-01-01	67.775
2017-01-01	69.525