Year	Percent
2003-01-01	0.57
2004-01-01	0.60
2005-01-01	0.50
2006-01-01	0.50
2007-01-01	0.48
2008-01-01	0.46
2009-01-01	0.46
2010-01-01	0.49
2011-01-01	0.52
2012-01-01	0.54
2013-01-01	0.55