Year	Percent
2000-01-01	5.150
2001-01-01	4.400
2002-01-01	4.175
2003-01-01	3.975
2004-01-01	3.525
2005-01-01	3.400
2006-01-01	3.525
2007-01-01	3.950
2008-01-01	3.750
2009-01-01	5.875
2010-01-01	5.925
2011-01-01	6.275
2012-01-01	5.950
2013-01-01	5.425
2014-01-01	4.450
2015-01-01	3.800
2016-01-01	4.200
2017-01-01	4.025