Year	Index
1996-01-01	0.51035500000000000
1997-01-01	0.48954800000000000
1998-01-01	0.53932800000000000
1999-01-01	0.54392200000000000
2000-01-01	0.47678100000000007
2001-01-01	0.48542700000000005
2002-01-01	0.41757799999999995
2003-01-01	0.39507400000000000
2004-01-01	0.22064499999999998
2005-01-01	0.49028700000000000
2006-01-01	0.48761300000000000
2007-01-01	0.36610200000000000
2008-01-01	0.44722799999999996
2009-01-01	0.42705299999999996
2010-01-01	0.46523400000000004
2011-01-01	0.38528900000000000
2012-01-01	0.37724900000000000
2013-01-01	0.46826000000000000