Year	Percent
2000-01-01	3.02980538826989
2001-01-01	2.73458576002431
2002-01-01	2.22467020945394
2003-01-01	2.63348403120254
2004-01-01	2.68138263741878
2005-01-01	2.88889260994743
2006-01-01	2.48354579229010
2007-01-01	2.42319859999580
2008-01-01	2.37221056378469
2009-01-01	2.74752097285764
2010-01-01	2.92929375837596
2011-01-01	2.84565108385957
2012-01-01	2.60724200805036
2013-01-01	2.53875439564376
2014-01-01	3.23028628909214
2015-01-01	3.17370953615763
2016-01-01	3.17359668432440
2017-01-01	3.26569887545007