Year	Index
2003-01-01	27.6
2004-01-01	31.6
2005-01-01	30.6
2006-01-01	26.4
2007-01-01	27.1
2008-01-01	27
2009-01-01	26.2
2010-01-01	25.7
2011-01-01	25.3
2012-01-01	25.7
2013-01-01	26.4
2014-01-01	26.8
2015-01-01	27.5