Year	Percent
2000-01-01	64.850
2001-01-01	64.200
2002-01-01	63.850
2003-01-01	63.175
2004-01-01	63.175
2005-01-01	62.225
2006-01-01	62.275
2007-01-01	61.375
2008-01-01	61.225
2009-01-01	59.225
2010-01-01	58.425
2011-01-01	58.200
2012-01-01	58.650
2013-01-01	58.325
2014-01-01	57.825
2015-01-01	58.525
2016-01-01	58.400
2017-01-01	57.625