Year	Percent
2000-01-01	5.600
2001-01-01	5.025
2002-01-01	5.200
2003-01-01	5.000
2004-01-01	4.725
2005-01-01	4.800
2006-01-01	5.425
2007-01-01	5.325
2008-01-01	5.700
2009-01-01	7.650
2010-01-01	7.925
2011-01-01	8.225
2012-01-01	8.075
2013-01-01	7.725
2014-01-01	6.275
2015-01-01	5.450
2016-01-01	4.950
2017-01-01	4.450