Year	Z-score
1996-01-01	12.999800000000000
1997-01-01	11.345999999999998
1998-01-01	11.955700000000000
1999-01-01	12.558900000000000
2000-01-01	12.247400000000000
2001-01-01	14.992700000000000
2002-01-01	13.521500000000000
2003-01-01	15.534500000000000
2004-01-01	15.531900000000000
2005-01-01	14.138900000000000
2006-01-01	14.168100000000000
2007-01-01	13.016800000000000
2008-01-01	13.054600000000000
2009-01-01	16.328600000000000
2010-01-01	15.006700000000000
2011-01-01	20.218700000000000
2012-01-01	21.244900000000000
2013-01-01	32.826000000000000
2014-01-01	29.786100000000000
2015-01-01	30.046500000000000
2016-01-01	27.017700000000000