Year	Z-score
1996-01-01	8.1811300000000000
1997-01-01	8.3372300000000000
1998-01-01	8.2471500000000000
1999-01-01	5.7088500000000000
2000-01-01	6.1587900000000000
2001-01-01	5.4017700000000000
2002-01-01	4.3520300000000000
2003-01-01	5.6415900000000000
2004-01-01	5.2906400000000000
2005-01-01	6.4723000000000000
2006-01-01	6.8286100000000000
2007-01-01	6.2548400000000000
2008-01-01	5.5896000000000000
2009-01-01	4.8916699999999995
2010-01-01	5.0197300000000000
2011-01-01	5.4540800000000000
2012-01-01	5.1004400000000000
2013-01-01	5.9106800000000000
2014-01-01	6.5499700000000000
2015-01-01	7.2143000000000000
2016-01-01	6.4189900000000000