Year	Percent
2000-01-01	68.650
2001-01-01	69.825
2002-01-01	70.875
2003-01-01	69.850
2004-01-01	70.425
2005-01-01	69.500
2006-01-01	69.375
2007-01-01	68.200
2008-01-01	66.650
2009-01-01	65.525
2010-01-01	63.325
2011-01-01	60.375
2012-01-01	58.225
2013-01-01	56.025
2014-01-01	54.450
2015-01-01	53.125
2016-01-01	51.700
2017-01-01	49.875