Year	Percent
2003-01-01	3.04999290742001
2004-01-01	2.60072513273760
2005-01-01	2.20386588335362
2006-01-01	2.27350775249745
2007-01-01	1.95744315133342
2008-01-01	2.81987188491849
2009-01-01	7.19799129194065
2010-01-01	6.98630952380952
2011-01-01	6.47110133180551
2012-01-01	5.20349494224114
2013-01-01	4.71418205602658