Year	Index
1988-01-01	49.105200000000000
1989-01-01	23.519000000000002
1990-01-01	28.705600000000000
1991-01-01	36.267500000000000
1992-01-01	27.899600000000000
1993-01-01	20.380900000000000
1994-01-01	23.157400000000000
1995-01-01	22.341900000000000
1996-01-01	17.707700000000000
1997-01-01	19.819600000000000
1998-01-01	34.686400000000000
1999-01-01	35.646200000000000
2000-01-01	24.666700000000000
2001-01-01	27.694600000000000
2002-01-01	23.182300000000000
2003-01-01	18.338500000000000
2004-01-01	18.620100000000000
2005-01-01	17.958100000000000
2006-01-01	18.492600000000000
2007-01-01	22.547900000000000
2008-01-01	27.076300000000000
2009-01-01	31.404000000000000
2010-01-01	22.728400000000000
2011-01-01	17.364400000000000
2012-01-01	17.823700000000000
2013-01-01	18.025500000000000
2014-01-01	20.324000000000000
2015-01-01	13.370700000000000
2016-01-01	16.989400000000000
2017-01-01	16.230600000000000