Year	Index
1987-01-01	43.5
1994-01-01	41.3
2002-01-01	41.4
2003-01-01	42.2
2004-01-01	41.3
2005-01-01	42.6
2006-01-01	39.6
2007-01-01	38.4
2008-01-01	39
2009-01-01	39
2010-01-01	38.8
2011-01-01	40
2012-01-01	40.2
2013-01-01	40.2
2014-01-01	41.2
2015-01-01	42.9
2016-01-01	41.9