Year	Percent
2003-01-01	56.300
2004-01-01	56.300
2005-01-01	56.225
2006-01-01	56.150
2007-01-01	56.275
2008-01-01	56.375
2009-01-01	56.575
2010-01-01	56.525
2011-01-01	56.250
2012-01-01	56.450
2013-01-01	56.450
2014-01-01	56.125
2015-01-01	56.075
2016-01-01	55.950
2017-01-01	55.725