Year	Percent
2003-01-01	73.525
2004-01-01	71.925
2005-01-01	76.100
2006-01-01	78.525
2007-01-01	79.825
2008-01-01	78.100
2009-01-01	73.075
2010-01-01	73.675
2011-01-01	73.050
2012-01-01	75.675
2013-01-01	78.000
2014-01-01	78.175
2015-01-01	80.150
2016-01-01	82.975
2017-01-01	82.250