Year	Percent
2000-01-01	55.875
2001-01-01	56.025
2002-01-01	57.900
2003-01-01	56.075
2004-01-01	55.975
2005-01-01	53.725
2006-01-01	52.950
2007-01-01	56.175
2008-01-01	58.125
2009-01-01	54.325
2010-01-01	52.600
2011-01-01	52.250
2012-01-01	53.825
2013-01-01	53.800
2014-01-01	52.125
2015-01-01	51.775
2016-01-01	50.050
2017-01-01	49.125