Year	Percent
2004-01-01	3.37
2005-01-01	4.43
2006-01-01	2.81
2007-01-01	3.29
2008-01-01	2.71
2009-01-01	3.46
2010-01-01	3.16
2011-01-01	1.88
2012-01-01	1.86
2013-01-01	2.29
2014-01-01	4.09
2015-01-01	6.65