Year	Z-score
1996-01-01	14.335800000000000
1997-01-01	15.581100000000000
1998-01-01	15.095400000000000
1999-01-01	14.973400000000000
2000-01-01	13.176600000000000
2001-01-01	12.829400000000000
2002-01-01	12.773000000000000
2003-01-01	15.991800000000000
2004-01-01	17.174700000000000
2005-01-01	18.348100000000000
2006-01-01	25.418600000000000
2007-01-01	27.915700000000000
2008-01-01	21.527800000000000
2009-01-01	26.453800000000000
2010-01-01	23.644000000000002
2011-01-01	22.441999999999997
2012-01-01	23.943500000000000
2013-01-01	23.521600000000000
2014-01-01	23.111600000000000
2015-01-01	24.866300000000000
2016-01-01	25.672400000000000