Year	Percent
1996-12-31	6.5
1997-12-31	7.595
1998-12-31	6.16
1999-12-31	6.0625
2000-12-31	5.845
2001-12-31	4.0313
2002-12-31	3.965
2003-12-31	3.945
2004-12-31	4.82
2005-12-31	4.585
2006-12-31	5.28
2007-12-31	6
2008-12-31	2.875
2009-12-31	0.62
2010-12-31	0.725
2011-12-31	1.105
2012-12-31	0.865