Year	Percent
2000-01-01	6.075
2001-01-01	5.975
2002-01-01	6.375
2003-01-01	6.550
2004-01-01	6.300
2005-01-01	6.200
2006-01-01	5.850
2007-01-01	6.000
2008-01-01	5.475
2009-01-01	5.575
2010-01-01	6.650
2011-01-01	6.975
2012-01-01	7.000
2013-01-01	7.750
2014-01-01	7.800
2015-01-01	7.925
2016-01-01	8.300
2017-01-01	8.675