Year	Z-score
1996-01-01	6.986300000000000
1997-01-01	8.474450000000000
1998-01-01	8.634530000000000
1999-01-01	8.860520000000000
2000-01-01	9.692600000000000
2001-01-01	11.234200000000000
2002-01-01	7.287870000000000
2003-01-01	7.907800000000000
2004-01-01	8.815590000000000
2005-01-01	9.192180000000000
2006-01-01	9.739139999999999
2007-01-01	10.178300000000000
2008-01-01	11.856300000000000
2009-01-01	13.058500000000000
2010-01-01	11.157400000000000
2011-01-01	12.963700000000000
2012-01-01	14.064900000000000
2013-01-01	12.926600000000000
2014-01-01	13.070700000000000
2015-01-01	12.371600000000000
2016-01-01	13.885200000000000