Year	Percent
2004-01-01	5.32
2005-01-01	5.38
2006-01-01	4.52
2007-01-01	4.45
2008-01-01	4.02
2009-01-01	6.40
2010-01-01	4.45
2011-01-01	3.65
2012-01-01	3.69
2013-01-01	4.03
2014-01-01	4.40