Year	Percent
2002-01-01	5.22
2003-01-01	5.14
2004-01-01	5.10
2005-01-01	5.11
2006-01-01	4.88
2007-01-01	4.50
2008-01-01	4.67
2009-01-01	5.03
2010-01-01	4.81
2011-01-01	4.62
2012-01-01	4.75
2013-01-01	5.33
2014-01-01	5.29
2015-01-01	5.24