Year	Index
2004-01-01	0.23063200000000000
2005-01-01	0.24634899999999998
2006-01-01	0.24260000000000000
2007-01-01	0.25097600000000003
2008-01-01	0.18635300000000000
2009-01-01	0.20616700000000002
2010-01-01	0.24095600000000000
2011-01-01	0.24893000000000000
2012-01-01	0.25606500000000000
2013-01-01	0.24349600000000000
2014-01-01	0.27882700000000000