Year	Index
1998-01-01	95.4629
1999-01-01	89.5399
2000-01-01	58.6305
2001-01-01	44.2251
2002-01-01	33.5854
2003-01-01	27.5021
2004-01-01	32.1266
2005-01-01	31.8135
2006-01-01	32.7604
2007-01-01	33.7179
2008-01-01	35.1257
2009-01-01	67.9755
2010-01-01	45.3123
2011-01-01	24.4523
2012-01-01	25.9622
2013-01-01	19.7465
2014-01-01	19.8064
2015-01-01	22.4767
2016-01-01	19.2369
2017-01-01	14.9272