Year	Percent
2000-01-01	59.450
2001-01-01	57.000
2002-01-01	55.800
2003-01-01	54.250
2004-01-01	53.175
2005-01-01	53.150
2006-01-01	51.875
2007-01-01	52.775
2008-01-01	56.575
2009-01-01	50.900
2010-01-01	50.375
2011-01-01	49.400
2012-01-01	50.675
2013-01-01	49.900
2014-01-01	48.225
2015-01-01	49.075
2016-01-01	47.000
2017-01-01	47.300