Year	Z-score
1996-01-01	8.185789999999999
1997-01-01	6.573360000000001
1998-01-01	6.142320000000000
1999-01-01	4.801069999999999
2000-01-01	9.198100000000000
2001-01-01	8.197420000000000
2002-01-01	6.016050000000000
2003-01-01	6.983410000000001
2004-01-01	8.630339999999999
2005-01-01	10.894400000000000
2006-01-01	11.507500000000000
2007-01-01	11.424500000000000
2008-01-01	11.393900000000000
2009-01-01	10.470999999999998
2010-01-01	10.992500000000000
2011-01-01	11.291800000000000
2012-01-01	11.136200000000000
2013-01-01	11.312300000000000
2014-01-01	12.267100000000000
2015-01-01	11.735200000000000
2016-01-01	4.400119999999999