Year	Z-score
1996-01-01	3.0371799999999998
1997-01-01	2.4649700000000000
1998-01-01	3.3664099999999997
1999-01-01	-2.6190700000000002
2000-01-01	2.5317800000000000
2001-01-01	2.8650300000000000
2002-01-01	3.3085800000000000
2003-01-01	3.9165699999999997
2004-01-01	4.5292699999999995
2005-01-01	4.0336700000000000
2006-01-01	4.3357700000000000
2007-01-01	4.2791500000000000
2008-01-01	3.9692700000000000
2009-01-01	4.3918800000000005
2010-01-01	4.7743699999999990
2011-01-01	5.0845699999999990
2012-01-01	5.1915200000000000
2013-01-01	5.2476900000000000
2014-01-01	5.3596600000000000
2015-01-01	5.6457400000000000
2016-01-01	6.0825000000000000