Year	Z-score
1996-01-01	6.7068800000000000
1997-01-01	8.8048600000000010
1998-01-01	4.8715300000000000
1999-01-01	6.0971199999999990
2000-01-01	4.4859200000000000
2001-01-01	4.9234400000000000
2002-01-01	5.3808200000000000
2003-01-01	5.4998400000000000
2004-01-01	1.3424700000000000
2005-01-01	2.3774300000000000
2006-01-01	2.7404100000000000
2007-01-01	4.6984200000000000
2008-01-01	5.3646300000000000
2009-01-01	5.7132200000000000
2010-01-01	5.7721500000000000
2011-01-01	5.6093300000000000
2012-01-01	5.9580400000000004
2013-01-01	5.8523900000000000
2014-01-01	6.0504100000000000
2015-01-01	6.3384599999999995
2016-01-01	5.6945800000000000