Year	Percent
2000-01-01	18.150
2001-01-01	19.900
2002-01-01	20.925
2003-01-01	20.475
2004-01-01	19.975
2005-01-01	19.200
2006-01-01	14.975
2007-01-01	10.375
2008-01-01	8.000
2009-01-01	8.675
2010-01-01	10.075
2011-01-01	10.425
2012-01-01	10.925
2013-01-01	11.100
2014-01-01	9.600
2015-01-01	7.725
2016-01-01	6.225
2017-01-01	4.900