Year	Percent
2002-01-01	2.38
2003-01-01	2.33
2004-01-01	2.36
2005-01-01	2.30
2006-01-01	2.25
2007-01-01	2.09
2008-01-01	2.21
2009-01-01	2.55
2010-01-01	2.61
2011-01-01	2.58
2012-01-01	2.79
2013-01-01	2.72
2014-01-01	2.84
2015-01-01	2.78