Year	Percent
2000-01-01	16.375
2001-01-01	18.575
2002-01-01	20.275
2003-01-01	19.950
2004-01-01	19.300
2005-01-01	18.000
2006-01-01	14.050
2007-01-01	9.700
2008-01-01	7.225
2009-01-01	8.300
2010-01-01	9.725
2011-01-01	9.775
2012-01-01	10.200
2013-01-01	10.450
2014-01-01	9.100
2015-01-01	7.575
2016-01-01	6.250
2017-01-01	4.950