Year	Index
1998-01-01	16.68890
1999-01-01	21.77480
2000-01-01	19.11580
2001-01-01	14.24560
2002-01-01	17.74890
2003-01-01	26.06210
2004-01-01	15.75620
2005-01-01	8.92685
2006-01-01	10.00920
2007-01-01	12.87140
2008-01-01	20.85850
2009-01-01	32.99680
2010-01-01	23.27900
2011-01-01	19.08460
2012-01-01	20.27240
2013-01-01	15.49020
2014-01-01	14.21240
2015-01-01	17.53370
2016-01-01	21.49090
2017-01-01	15.36360