Year	Percent
2003-01-01	75.500
2004-01-01	75.600
2005-01-01	76.000
2006-01-01	75.300
2007-01-01	75.000
2008-01-01	74.675
2009-01-01	76.575
2010-01-01	76.025
2011-01-01	74.975
2012-01-01	75.975
2013-01-01	76.350
2014-01-01	77.225
2015-01-01	76.000
2016-01-01	75.050
2017-01-01	74.025