Year	Percent
2004-12-31	4.86
2005-12-31	4.54
2006-12-31	5.38
2007-12-31	5.93
2008-12-31	3.1
2009-12-31	0.6
2010-12-31	1.04
2011-12-31	1.28
2012-12-31	0.67