Year	Z-score
1996-01-01	6.014600000000000
1997-01-01	5.267770000000000
1998-01-01	6.913320000000000
1999-01-01	6.098420000000000
2000-01-01	7.464980000000001
2001-01-01	8.754260000000000
2002-01-01	8.635710000000001
2003-01-01	8.769360000000000
2004-01-01	9.091300000000000
2005-01-01	8.994310000000000
2006-01-01	10.915100000000000
2007-01-01	12.212200000000000
2008-01-01	11.892400000000000
2009-01-01	10.617200000000000
2010-01-01	9.733139999999999
2011-01-01	8.548400000000000
2012-01-01	9.054580000000000
2013-01-01	8.402900000000000
2014-01-01	8.235600000000000
2015-01-01	8.373640000000000
2016-01-01	7.999389999999999