Year	Percent
2000-01-01	41.475
2001-01-01	41.575
2002-01-01	42.400
2003-01-01	41.075
2004-01-01	40.700
2005-01-01	40.050
2006-01-01	38.450
2007-01-01	39.025
2008-01-01	37.975
2009-01-01	37.875
2010-01-01	37.275
2011-01-01	36.325
2012-01-01	36.325
2013-01-01	35.925
2014-01-01	36.525
2015-01-01	34.625
2016-01-01	33.900
2017-01-01	32.725