Year	Percent
2000-01-01	12.625
2001-01-01	11.775
2002-01-01	11.975
2003-01-01	12.225
2004-01-01	11.950
2005-01-01	12.725
2006-01-01	13.875
2007-01-01	14.250
2008-01-01	14.975
2009-01-01	19.100
2010-01-01	19.875
2011-01-01	21.250
2012-01-01	21.200
2013-01-01	20.650
2014-01-01	16.950
2015-01-01	14.625
2016-01-01	13.000
2017-01-01	12.075