Year	Percent
2000-01-01	53.450
2001-01-01	53.425
2002-01-01	52.500
2003-01-01	51.825
2004-01-01	51.775
2005-01-01	51.875
2006-01-01	50.750
2007-01-01	50.600
2008-01-01	51.125
2009-01-01	52.025
2010-01-01	52.550
2011-01-01	52.850
2012-01-01	53.375
2013-01-01	53.475
2014-01-01	53.975
2015-01-01	53.925
2016-01-01	54.025
2017-01-01	54.075