Year	Percent
2004-01-01	1.84
2005-01-01	1.68
2006-01-01	2.05
2007-01-01	2.20
2008-01-01	1.81
2009-01-01	2.32
2010-01-01	2.18
2011-01-01	2.09
2012-01-01	2.00
2013-01-01	2.35
2014-01-01	2.44
2015-01-01	2.90
2016-01-01	1.29