Year	Percent
2000-01-01	4.150
2001-01-01	3.500
2002-01-01	4.125
2003-01-01	4.425
2004-01-01	4.350
2005-01-01	4.000
2006-01-01	4.075
2007-01-01	4.150
2008-01-01	6.275
2009-01-01	13.125
2010-01-01	15.375
2011-01-01	16.125
2012-01-01	15.875
2013-01-01	13.350
2014-01-01	11.350
2015-01-01	9.475
2016-01-01	7.925
2017-01-01	6.225