Year	Percent
2005-01-01	4.41428053748066
2006-01-01	4.04630470070917
2007-01-01	3.60565330008668
2008-01-01	3.73699002301653
2009-01-01	5.03075507450451
2010-01-01	5.31570603792152
2011-01-01	5.29470665831470
2012-01-01	5.99640880360908