Year	Percent
2005-01-01	8.96348966801613
2006-01-01	8.25327363840257
2007-01-01	7.37957483978522
2008-01-01	7.44097724731164
2009-01-01	9.49370927879119
2010-01-01	10.07179853813050
2011-01-01	10.12906714768160
2012-01-01	11.30867146289470
2013-01-01	11.94233542952760
2014-01-01	11.60458790246310
2015-01-01	10.84458050375910
2016-01-01	10.01065945089760
2017-01-01	9.04360480459811