Year	Index
1997-01-01	-0.115039
1998-01-01	-0.051604
1999-01-01	-0.059514
2000-01-01	-0.064200
2001-01-01	-0.065348
2002-01-01	-0.048632
2003-01-01	-0.046569
2004-01-01	-0.045711
2005-01-01	-0.053070
2006-01-01	0.000000
2007-01-01	-0.049469
2008-01-01	-0.043465
2009-01-01	-0.049090
2010-01-01	-0.047988