Year	Index
1981-01-01	15.788600000000000
1982-01-01	14.655600000000000
1983-01-01	15.873600000000000
1984-01-01	14.168800000000000
1985-01-01	12.031200000000000
1986-01-01	11.730200000000000
1987-01-01	17.103700000000000
1988-01-01	34.382600000000000
1989-01-01	17.651800000000000
1990-01-01	14.430500000000000
1991-01-01	14.607200000000000
1992-01-01	12.602700000000000
1993-01-01	11.708700000000000
1994-01-01	13.143800000000000
1995-01-01	12.903700000000000
1996-01-01	11.077600000000000
1997-01-01	12.104800000000000
1998-01-01	16.298100000000000
1999-01-01	14.921400000000000
2000-01-01	13.639800000000000
2001-01-01	12.692100000000000
2002-01-01	12.243200000000000
2003-01-01	11.621900000000000
2004-01-01	8.452750000000000
2005-01-01	7.562819999999999
2006-01-01	10.821800000000000
2007-01-01	13.717700000000000
2008-01-01	22.243900000000000
2009-01-01	29.740400000000000
2010-01-01	20.537100000000000
2011-01-01	15.834400000000000
2012-01-01	17.592800000000000
2013-01-01	12.755700000000000
2014-01-01	11.295300000000000
2015-01-01	12.556700000000000
2016-01-01	16.338400000000000
2017-01-01	12.427800000000000