Year	Z-score
1996-01-01	12.2550000000000000
1997-01-01	12.5629999999999990
1998-01-01	13.0145000000000000
1999-01-01	10.0953000000000000
2000-01-01	10.0127000000000000
2001-01-01	8.8071500000000000
2002-01-01	8.3948800000000000
2003-01-01	8.1506800000000000
2004-01-01	7.4924700000000000
2005-01-01	8.4953399999999990
2006-01-01	7.6248100000000010
2007-01-01	6.7213300000000000
2008-01-01	4.0523900000000000
2009-01-01	5.0997900000000005