Year	Percent
2000-01-01	40.825
2001-01-01	43.075
2002-01-01	41.550
2003-01-01	40.525
2004-01-01	39.750
2005-01-01	39.475
2006-01-01	37.550
2007-01-01	36.525
2008-01-01	36.525
2009-01-01	38.075
2010-01-01	39.275
2011-01-01	38.700
2012-01-01	38.550
2013-01-01	38.400
2014-01-01	38.725
2015-01-01	38.400
2016-01-01	39.775
2017-01-01	39.700