Year	Percent
1998-01-01	5.625
1999-01-01	5.500
2000-01-01	5.650
2001-01-01	5.875
2002-01-01	5.900
2003-01-01	5.675
2004-01-01	5.400
2005-01-01	5.400
2006-01-01	5.275
2007-01-01	5.400
2008-01-01	5.625
2009-01-01	5.600
2010-01-01	5.800
2011-01-01	6.500
2012-01-01	6.425
2013-01-01	6.425
2014-01-01	6.875
2015-01-01	6.900
2016-01-01	6.850
2017-01-01	7.000