Year	Percent
2005-01-01	71.625
2006-01-01	72.400
2007-01-01	73.225
2008-01-01	73.175
2009-01-01	70.850
2010-01-01	70.200
2011-01-01	70.075
2012-01-01	69.300
2013-01-01	68.725
2014-01-01	68.925
2015-01-01	69.600
2016-01-01	70.575
2017-01-01	71.550