Year	Percent
1999-01-01	5.650
2000-01-01	4.650
2001-01-01	4.650
2002-01-01	4.625
2003-01-01	5.475
2004-01-01	5.600
2005-01-01	4.900
2006-01-01	3.975
2007-01-01	3.825
2008-01-01	3.475
2009-01-01	6.100
2010-01-01	7.600
2011-01-01	7.725
2012-01-01	7.675
2013-01-01	7.150
2014-01-01	6.750
2015-01-01	6.300
2016-01-01	6.350
2017-01-01	5.875