Year	Z-score
1996-01-01	3.9443099999999998
1997-01-01	4.2325700000000000
1998-01-01	4.1447400000000005
1999-01-01	3.5389999999999997
2000-01-01	3.3676300000000000
2001-01-01	3.9886800000000004
2002-01-01	3.3576500000000000
2003-01-01	3.4409900000000000
2004-01-01	9.8998600000000000
2005-01-01	5.6900100000000000
2006-01-01	5.6177100000000000
2007-01-01	4.9707600000000000
2008-01-01	5.6192000000000000
2009-01-01	4.5839900000000000
2010-01-01	4.7507100000000000
2011-01-01	4.8172500000000000
2012-01-01	4.1283900000000004
2013-01-01	4.4662700000000000
2014-01-01	3.4003300000000003
2015-01-01	2.1598700000000000
2016-01-01	4.6420600000000000