Year	Percent
1996-12-31	6.4
1997-12-31	7.335
1998-12-31	5.485
1999-12-31	5.875
2000-12-31	5.61
2001-12-31	3.92
2002-12-31	3.795
2003-12-31	3.995
2004-12-31	4.745
2005-12-31	4.405
2006-12-31	5.26
2007-12-31	5.285
2008-12-31	1.205
2009-12-31	0.535
2010-12-31	0.605
2011-12-31	0.475
2012-12-31	0.445