Year	Percent
2005-01-01	4.1
2006-01-01	3.9
2007-01-01	3.7
2008-01-01	3.8
2009-01-01	5.0
2010-01-01	5.2
2011-01-01	5.1
2012-01-01	5.1
2013-01-01	5.0
2014-01-01	4.7
2015-01-01	4.4
2016-01-01	4.1