Year	Index
1978-01-01	12.396400000000000
1979-01-01	19.033900000000000
1980-01-01	16.016600000000000
1981-01-01	22.381999999999998
1982-01-01	28.318500000000000
1983-01-01	19.262800000000000
1984-01-01	15.034300000000000
1985-01-01	15.817200000000000
1986-01-01	24.822400000000000
1987-01-01	26.735500000000000
1988-01-01	38.896000000000000
1989-01-01	21.357100000000000
1990-01-01	21.289500000000000
1991-01-01	23.515500000000000
1992-01-01	17.643100000000000
1993-01-01	12.739300000000000
1994-01-01	24.236000000000000
1995-01-01	23.128900000000000
1996-01-01	16.689400000000000
1997-01-01	17.661400000000000
1998-01-01	48.180900000000000
1999-01-01	53.035200000000000
2000-01-01	27.002700000000000
2001-01-01	21.191100000000000
2002-01-01	18.067600000000000
2003-01-01	12.967600000000000
2004-01-01	12.107300000000000
2005-01-01	10.241900000000000
2006-01-01	7.772069999999999
2007-01-01	12.281500000000000
2008-01-01	19.040700000000000
2009-01-01	19.142300000000000
2010-01-01	12.054800000000000
2011-01-01	9.241920000000000
2012-01-01	10.376000000000000
2013-01-01	8.570650000000000
2014-01-01	8.147720000000000
2015-01-01	9.086630000000000
2016-01-01	11.095500000000000
2017-01-01	7.721930000000000