Year	Percent
2004-01-01	1.3846990000000000
2005-01-01	1.5146230000000000
2006-01-01	1.7372130000000001
2007-01-01	1.8507419999999999
2008-01-01	2.1940640000000000
2009-01-01	2.4909870000000000
2010-01-01	2.5835800000000000
2011-01-01	2.3657810000000000
2012-01-01	2.1604250000000000
2013-01-01	2.4456590000000000
2014-01-01	2.7028390000000000