Year	Percent
2000-01-01	75.175
2001-01-01	75.825
2002-01-01	75.675
2003-01-01	74.300
2004-01-01	73.575
2005-01-01	73.250
2006-01-01	74.150
2007-01-01	75.200
2008-01-01	75.875
2009-01-01	75.250
2010-01-01	72.750
2011-01-01	71.750
2012-01-01	71.525
2013-01-01	70.250
2014-01-01	70.075
2015-01-01	70.425
2016-01-01	70.750
2017-01-01	71.450