Year	Percent
2003-01-01	80.525
2004-01-01	80.600
2005-01-01	80.800
2006-01-01	81.250
2007-01-01	82.075
2008-01-01	83.150
2009-01-01	82.100
2010-01-01	81.950
2011-01-01	81.450
2012-01-01	80.925
2013-01-01	80.600
2014-01-01	79.800
2015-01-01	79.375
2016-01-01	79.700
2017-01-01	80.000