Year	Percent
2000-01-01	4.500
2001-01-01	4.100
2002-01-01	4.825
2003-01-01	5.125
2004-01-01	4.975
2005-01-01	4.675
2006-01-01	4.650
2007-01-01	5.125
2008-01-01	7.800
2009-01-01	15.475
2010-01-01	17.500
2011-01-01	18.175
2012-01-01	18.175
2013-01-01	15.275
2014-01-01	13.050
2015-01-01	11.100
2016-01-01	9.300
2017-01-01	7.300