Year	Percent
2000-01-01	53.475
2001-01-01	51.950
2002-01-01	50.725
2003-01-01	49.775
2004-01-01	49.200
2005-01-01	46.925
2006-01-01	45.575
2007-01-01	44.750
2008-01-01	44.275
2009-01-01	45.175
2010-01-01	44.900
2011-01-01	44.525
2012-01-01	44.850
2013-01-01	42.450
2014-01-01	41.450
2015-01-01	39.725
2016-01-01	38.900
2017-01-01	37.800