Year	Index
1988-01-01	30.450000000000000
1989-01-01	20.693700000000000
1990-01-01	25.569800000000000
1991-01-01	40.299500000000000
1992-01-01	29.237100000000000
1993-01-01	23.574200000000000
1994-01-01	25.577300000000000
1995-01-01	23.494800000000000
1996-01-01	19.325200000000000
1997-01-01	26.862900000000000
1998-01-01	41.086700000000000
1999-01-01	43.096000000000004
2000-01-01	35.494700000000000
2001-01-01	28.708700000000000
2002-01-01	24.744400000000000
2003-01-01	20.292600000000000
2004-01-01	23.061300000000000
2005-01-01	20.669600000000000
2006-01-01	15.878400000000000
2007-01-01	23.417600000000000
2008-01-01	24.827500000000000
2009-01-01	32.360400000000000
2010-01-01	25.513000000000000
2011-01-01	19.404300000000000
2012-01-01	20.154700000000000
2013-01-01	16.849200000000000
2014-01-01	18.952800000000000
2015-01-01	13.300300000000000
2016-01-01	14.409800000000000
2017-01-01	12.107100000000000