Year	Percent
2001-01-01	5.150
2002-01-01	5.500
2003-01-01	6.150
2004-01-01	6.875
2005-01-01	7.575
2006-01-01	6.900
2007-01-01	5.900
2008-01-01	5.950
2009-01-01	8.650
2010-01-01	8.700
2011-01-01	7.825
2012-01-01	8.225
2013-01-01	8.175
2014-01-01	8.175
2015-01-01	7.525
2016-01-01	7.350
2017-01-01	6.975