Year	Z-score
1996-01-01	8.7219600000000010
1997-01-01	8.3233000000000000
1998-01-01	7.0458100000000000
1999-01-01	6.3025800000000000
2000-01-01	6.9915699999999990
2001-01-01	5.1315300000000010
2002-01-01	6.6267500000000000
2003-01-01	6.7591600000000005
2004-01-01	6.6247000000000000
2005-01-01	5.5953800000000005
2006-01-01	5.7708000000000000
2007-01-01	5.2437200000000000
2008-01-01	5.0597000000000000
2009-01-01	4.5220000000000000
2010-01-01	4.2678300000000000
2011-01-01	4.1988800000000000
2012-01-01	4.3945600000000000
2013-01-01	4.5493600000000000
2014-01-01	4.4996900000000000
2015-01-01	4.6729600000000000
2016-01-01	4.8531699999999995