Year	Percent
2003-01-01	80.125
2004-01-01	78.800
2005-01-01	80.525
2006-01-01	80.875
2007-01-01	80.800
2008-01-01	79.575
2009-01-01	76.550
2010-01-01	76.200
2011-01-01	76.625
2012-01-01	77.875
2013-01-01	78.950
2014-01-01	80.525
2015-01-01	82.300
2016-01-01	83.575
2017-01-01	83.475