Year	Percent
1994-01-01	13.650
1995-01-01	13.100
1996-01-01	11.325
1997-01-01	11.800
1998-01-01	12.625
1999-01-01	16.325
2000-01-01	18.775
2001-01-01	19.300
2002-01-01	18.675
2003-01-01	17.550
2004-01-01	18.250
2005-01-01	16.250
2006-01-01	13.375
2007-01-01	11.150
2008-01-01	9.500
2009-01-01	12.025
2010-01-01	14.400
2011-01-01	13.625
2012-01-01	13.950
2013-01-01	14.225
2014-01-01	13.200
2015-01-01	11.475
2016-01-01	9.650
2017-01-01	8.125