Year	Percent
1999-01-01	6.150
2000-01-01	6.000
2001-01-01	6.350
2002-01-01	5.750
2003-01-01	5.375
2004-01-01	7.950
2005-01-01	8.000
2006-01-01	7.825
2007-01-01	7.450
2008-01-01	7.900
2009-01-01	8.075
2010-01-01	8.075
2011-01-01	8.025
2012-01-01	7.725
2013-01-01	7.900
2014-01-01	8.575
2015-01-01	8.375
2016-01-01	8.225
2017-01-01	7.750