Year	Percent
2002-01-01	2.23
2003-01-01	2.31
2004-01-01	2.21
2005-01-01	2.25
2006-01-01	2.05
2007-01-01	2.20
2008-01-01	2.43
2009-01-01	2.74
2010-01-01	2.92
2011-01-01	2.72
2012-01-01	2.79
2013-01-01	2.97
2014-01-01	3.09
2015-01-01	3.23
2016-01-01	3.05