Year	Index
1988-01-01	28.24480
1989-01-01	16.53120
1990-01-01	14.27000
1991-01-01	17.17240
1992-01-01	12.19190
1993-01-01	15.06700
1994-01-01	14.53410
1995-01-01	11.07530
1996-01-01	8.94135
1997-01-01	10.11030
1998-01-01	16.51800
1999-01-01	21.79140
2000-01-01	18.13450
2001-01-01	18.14450
2002-01-01	20.26750
2003-01-01	20.76400
2004-01-01	14.24870
2005-01-01	12.17720
2006-01-01	12.54170
2007-01-01	16.47410
2008-01-01	30.26280
2009-01-01	45.65850
2010-01-01	31.71590
2011-01-01	23.82400
2012-01-01	21.74990
2013-01-01	15.85190
2014-01-01	14.51380
2015-01-01	16.93750
2016-01-01	21.56410
2017-01-01	18.96930