Year	Index
1993-01-01	26.6
1996-01-01	25.8
2004-01-01	27.5
2005-01-01	26.9
2006-01-01	26.7
2007-01-01	26
2008-01-01	26.3
2009-01-01	26.2
2010-01-01	26.6
2011-01-01	26.4
2012-01-01	26.1
2013-01-01	26.5
2014-01-01	25.9
2015-01-01	25.9