Year	Percent
2001-01-01	2.47554648251005
2002-01-01	2.58681736514573
2003-01-01	2.89454165114249
2004-01-01	3.32541117229189
2005-01-01	3.88105831960524
2006-01-01	3.70840638840992
2007-01-01	3.25959565877704
2008-01-01	3.31859984553404
2009-01-01	4.40989160671072
2010-01-01	4.55247724224878
2011-01-01	4.15739347613638
2012-01-01	4.26673607480042
2013-01-01	4.33628207360893
2014-01-01	4.31786732828566