Year	Index
1993-01-01	29.2
2004-01-01	24.8
2005-01-01	24.6
2006-01-01	24.4
2007-01-01	24.4
2008-01-01	23.7
2009-01-01	24.8
2010-01-01	24.9
2011-01-01	24.9
2012-01-01	25.6
2013-01-01	26.2
2014-01-01	25.7
2015-01-01	25.4