Year	Index
1984-01-01	48.9
1992-01-01	49.6
1994-01-01	50.3
1996-01-01	48.2
1998-01-01	48.7
2000-01-01	51.4
2002-01-01	49
2004-01-01	48.3
2005-01-01	48.9
2006-01-01	47.7
2008-01-01	44.6
2010-01-01	45.3
2012-01-01	45.4
2014-01-01	45.8
2016-01-01	43.4