Year	Index
1997-01-01	-0.15087700000000000
1998-01-01	0.37283800000000000
1999-01-01	0.53969700000000000
2000-01-01	0.50385600000000010
2001-01-01	0.45025200000000004
2002-01-01	0.52186000000000000
2003-01-01	0.42167200000000005
2004-01-01	0.46369900000000000
2005-01-01	0.42937500000000000
2006-01-01	0.41976300000000000
2007-01-01	0.42164300000000005
2008-01-01	0.35783100000000000
2009-01-01	0.29910400000000000
2010-01-01	0.29308400000000000
2011-01-01	0.31092800000000004
2012-01-01	0.21975900000000000
2013-01-01	0.27787300000000000
2014-01-01	0.33584100000000000