Year	Percent
2000-01-01	54.175
2001-01-01	53.150
2002-01-01	51.975
2003-01-01	52.300
2004-01-01	52.425
2005-01-01	53.275
2006-01-01	54.950
2007-01-01	69.350
2008-01-01	65.950
2009-01-01	60.050
2010-01-01	53.875
2011-01-01	51.375
2012-01-01	50.300
2013-01-01	49.900
2014-01-01	48.025
2015-01-01	47.450
2016-01-01	50.575
2017-01-01	46.725