Year	Index
1996-01-01	0.21908200000000003
1997-01-01	0.20886200000000000
1998-01-01	0.20134000000000002
1999-01-01	0.19549000000000000
2000-01-01	0.16344100000000000
2001-01-01	0.12542400000000000
2002-01-01	0.16056900000000002
2003-01-01	0.23048900000000000
2004-01-01	0.22534800000000000
2005-01-01	0.23107500000000000
2006-01-01	0.22469200000000000
2007-01-01	0.20828500000000000
2008-01-01	0.18314900000000000
2009-01-01	0.20078600000000000
2010-01-01	0.27106500000000000