Year	Percent
2003-12-31	2.1
2004-12-31	2.12
2005-12-31	2.48
2006-12-31	3.7
2007-12-31	4.69
2008-12-31	2.93
2009-12-31	0.64
2010-12-31	1
2011-12-31	1.29
2012-12-31	0.14