Year	Percent
1999-01-01	4.925
2000-01-01	5.225
2001-01-01	4.925
2002-01-01	5.425
2003-01-01	5.375
2004-01-01	4.250
2005-01-01	3.950
2006-01-01	4.000
2007-01-01	3.475
2008-01-01	2.250
2009-01-01	2.725
2010-01-01	2.450
2011-01-01	3.600
2012-01-01	3.425
2013-01-01	3.775
2014-01-01	3.800
2015-01-01	4.725
2016-01-01	4.950
2017-01-01	4.250