Year	Index
1990-01-01	40.8
1995-01-01	58.2
1997-01-01	54.9
1999-01-01	54.6
2001-01-01	54.6
2002-01-01	57.3
2003-01-01	54.9
2004-01-01	52.3
2005-01-01	51.4
2006-01-01	53
2007-01-01	53
2008-01-01	50.7
2009-01-01	49.1
2010-01-01	51
2011-01-01	52.3
2012-01-01	47.6
2013-01-01	47.9
2014-01-01	50.7
2015-01-01	47.6
2016-01-01	47.9