Year	Percent
2000-01-01	54.175
2001-01-01	53.075
2002-01-01	50.550
2003-01-01	50.500
2004-01-01	50.700
2005-01-01	51.450
2006-01-01	53.950
2007-01-01	66.825
2008-01-01	58.475
2009-01-01	42.900
2010-01-01	36.550
2011-01-01	34.225
2012-01-01	32.475
2013-01-01	35.950
2014-01-01	36.825
2015-01-01	38.375
2016-01-01	42.325
2017-01-01	40.200