Year	Percent
1999-01-01	8.575
2000-01-01	7.000
2001-01-01	6.625
2002-01-01	7.500
2003-01-01	8.175
2004-01-01	8.400
2005-01-01	8.475
2006-01-01	8.250
2007-01-01	7.500
2008-01-01	6.975
2009-01-01	7.925
2010-01-01	8.325
2011-01-01	7.175
2012-01-01	7.550
2013-01-01	8.450
2014-01-01	8.550
2015-01-01	8.525
2016-01-01	7.825
2017-01-01	7.075