Year	Percent
2003-12-31	2.12
2004-12-31	2.09
2005-12-31	2.17
2006-12-31	3.07
2007-12-31	4.27
2008-12-31	4.65
2009-12-31	1.2
2010-12-31	0.7442
2011-12-31	1.301
2012-12-31	0.4979