Year	Percent
2001-01-01	2.79134855650406
2002-01-01	2.95223207282856
2003-01-01	3.30104964315092
2004-01-01	3.70154364212572
2005-01-01	4.16709166601405
2006-01-01	3.83346146218778
2007-01-01	3.29269968124719
2008-01-01	3.34739196019520
2009-01-01	4.83038796759213
2010-01-01	4.88504107422078
2011-01-01	4.41907017273418
2012-01-01	4.63607275797846
2013-01-01	4.65545495491879
2014-01-01	4.68601837660648