Year	Z-score
1996-01-01	11.5686
1997-01-01	10.8404
1998-01-01	15.5997
1999-01-01	24.0352
2000-01-01	26.3409
2001-01-01	21.3865
2002-01-01	17.1348
2003-01-01	22.4181
2004-01-01	20.8334
2005-01-01	18.8579
2006-01-01	17.8238
2007-01-01	11.6951
2008-01-01	15.5485
2009-01-01	13.1030
2010-01-01	16.1172
2011-01-01	16.2785
2012-01-01	16.1475
2013-01-01	15.8780
2014-01-01	14.7165
2015-01-01	15.8365
2016-01-01	14.9818