Year	Percent
1998-01-01	4.925
1999-01-01	4.925
2000-01-01	5.075
2001-01-01	5.075
2002-01-01	5.175
2003-01-01	5.550
2004-01-01	5.425
2005-01-01	5.150
2006-01-01	5.175
2007-01-01	4.950
2008-01-01	5.225
2009-01-01	4.925
2010-01-01	4.500
2011-01-01	4.675
2012-01-01	4.525
2013-01-01	4.175
2014-01-01	4.375
2015-01-01	4.575
2016-01-01	4.625
2017-01-01	4.350