Year	Percent
1996-12-31	5.78
1997-12-31	7.3
1998-12-31	5.45
1999-12-31	3.3
2000-12-31	4.75
2001-12-31	4.75
2002-12-31	4.575
2003-12-31	3.35
2004-12-31	4.775
2005-12-31	4.69
2006-12-31	4.9
2007-12-31	5.975
2008-12-31	1.75
2009-12-31	0.455
2010-12-31	0.525
2011-12-31	0.1
2012-12-31	0.265
2013-12-31	-0.25
2014-12-31	0
2015-12-31	-0.175
2016-12-31	0.015
2017-12-31	0.44