Year	Percent
2005-01-01	64.700
2006-01-01	67.000
2007-01-01	64.500
2008-01-01	66.100
2009-01-01	68.500
2010-01-01	67.375
2011-01-01	67.875
2012-01-01	66.250
2013-01-01	67.050
2014-01-01	67.475
2015-01-01	68.325
2016-01-01	68.975
2017-01-01	67.750