Year	Z-score
1996-01-01	26.45050
1997-01-01	23.10700
1998-01-01	23.51800
1999-01-01	19.72270
2000-01-01	16.08070
2001-01-01	12.94830
2002-01-01	11.61420
2003-01-01	12.58460
2004-01-01	12.56230
2005-01-01	12.71990
2006-01-01	12.39440
2007-01-01	12.49570
2008-01-01	11.40990
2009-01-01	10.52170
2010-01-01	15.82350
2011-01-01	16.32450
2012-01-01	15.61510
2013-01-01	19.09140
2014-01-01	12.21330
2015-01-01	8.57056
2016-01-01	15.41170