Year	Percent
1999-01-01	7.025
2000-01-01	6.850
2001-01-01	8.275
2002-01-01	7.975
2003-01-01	7.550
2004-01-01	7.550
2005-01-01	7.700
2006-01-01	7.525
2007-01-01	7.475
2008-01-01	7.525
2009-01-01	7.825
2010-01-01	7.575
2011-01-01	7.525
2012-01-01	7.425
2013-01-01	7.550
2014-01-01	7.450
2015-01-01	7.400
2016-01-01	7.525
2017-01-01	8.025