Year	Z-score
1996-01-01	16.91440
1997-01-01	17.07120
1998-01-01	17.84650
1999-01-01	21.36780
2000-01-01	22.30140
2001-01-01	23.68830
2002-01-01	23.53340
2003-01-01	22.01800
2004-01-01	11.72330
2005-01-01	9.92344
2006-01-01	13.91240
2007-01-01	12.01150
2008-01-01	10.07800
2009-01-01	12.39870
2010-01-01	12.10870
2011-01-01	11.81650
2012-01-01	12.17310
2013-01-01	14.72820
2014-01-01	14.56510
2015-01-01	16.58560
2016-01-01	15.67880