Year	Index
2003-01-01	27.7
2004-01-01	27.9
2005-01-01	27.6
2006-01-01	28
2007-01-01	28.3
2008-01-01	27.8
2009-01-01	27.5
2010-01-01	27.7
2011-01-01	27.6
2012-01-01	27.1
2013-01-01	27.2
2014-01-01	26.8
2015-01-01	27.1