Year	Index
1997-01-01	35.202600000000000
1998-01-01	57.076700000000000
1999-01-01	50.691800000000000
2000-01-01	26.370800000000000
2001-01-01	20.791400000000000
2002-01-01	18.505200000000000
2003-01-01	16.406000000000000
2004-01-01	16.007400000000000
2005-01-01	14.339700000000000
2006-01-01	10.378300000000000
2007-01-01	15.034600000000000
2008-01-01	18.326300000000000
2009-01-01	27.728400000000000
2010-01-01	28.293400000000000
2011-01-01	22.409400000000000
2012-01-01	20.844000000000000
2013-01-01	12.674700000000000
2014-01-01	9.619560000000000
2015-01-01	9.754900000000000
2016-01-01	10.398200000000000
2017-01-01	7.964519999999999