Year	Index
1997-01-01	16.704400000000000
1998-01-01	17.469300000000000
1999-01-01	14.070000000000000
2000-01-01	15.345300000000000
2001-01-01	20.358800000000000
2002-01-01	22.256900000000000
2003-01-01	18.395900000000000
2004-01-01	18.844700000000000
2005-01-01	21.901300000000000
2006-01-01	27.710900000000000
2007-01-01	22.271900000000000
2008-01-01	21.110000000000000
2009-01-01	23.987600000000000
2010-01-01	16.674800000000000
2011-01-01	10.747100000000000
2012-01-01	8.723600000000000
2013-01-01	8.723600000000000
2014-01-01	6.189590000000000
2015-01-01	6.499460000000000
2016-01-01	7.328200000000000
2017-01-01	7.834289999999999