Year	Index
1996-01-01	35.4
2001-01-01	36
2002-01-01	34.9
2003-01-01	33.8
2004-01-01	32
2005-01-01	39.9
2006-01-01	30.3
2007-01-01	30.1
2008-01-01	28.5
2009-01-01	28.2
2010-01-01	28
2011-01-01	28
2012-01-01	28.1
2013-01-01	27.1
2014-01-01	27
2015-01-01	26.9