Year	Percent
2004-12-31	4.81
2005-12-31	4.6
2006-12-31	5.27
2007-12-31	5.99
2008-12-31	2.9
2009-12-31	0.53
2010-12-31	0.74
2011-12-31	1.02
2012-12-31	0.52