Year	Index
1996-01-01	25.8
2004-01-01	27.1
2005-01-01	29.3
2006-01-01	25.8
2007-01-01	24.7
2008-01-01	26
2009-01-01	27.2
2010-01-01	27.3
2011-01-01	26.5
2012-01-01	26.1
2013-01-01	28.1
2014-01-01	26.1
2015-01-01	26.5