Year	Index
1993-01-01	33.6
2004-01-01	37
2005-01-01	35.3
2006-01-01	34.4
2007-01-01	34.8
2008-01-01	35.7
2009-01-01	37.2
2010-01-01	33.6
2011-01-01	32.5
2012-01-01	35.1
2013-01-01	35.3
2014-01-01	37.7
2015-01-01	37.4