Year	Percent
2004-01-01	5.5
2005-01-01	5.4
2006-01-01	5.0
2007-01-01	4.7
2008-01-01	4.9
2009-01-01	6.4
2010-01-01	6.6
2011-01-01	6.4
2012-01-01	6.2
2013-01-01	5.9
2014-01-01	5.4
2015-01-01	4.9
2016-01-01	4.6