Year	Percent
2001-01-01	11.750
2002-01-01	12.875
2003-01-01	13.725
2004-01-01	17.075
2005-01-01	21.675
2006-01-01	21.525
2007-01-01	19.325
2008-01-01	20.150
2009-01-01	24.900
2010-01-01	24.775
2011-01-01	22.750
2012-01-01	23.600
2013-01-01	23.525
2014-01-01	22.875
2015-01-01	20.325
2016-01-01	18.825
2017-01-01	17.875