Year	Percent
2000-01-01	2.20355494394012
2001-01-01	2.38429896891928
2002-01-01	2.50632169113928
2003-01-01	2.55584019573009
2004-01-01	2.57332669966884
2005-01-01	2.87208874306015
2006-01-01	2.28291948580979
2007-01-01	1.68047772352873
2008-01-01	1.66741588065330
2009-01-01	1.81637093561777
2010-01-01	2.01833304991079
2011-01-01	2.05213926681927
2012-01-01	1.80297546823782
2013-01-01	2.20864063051911