Year	Z-score
1996-01-01	9.180940000000000
1997-01-01	13.539400000000000
1998-01-01	11.491200000000000
1999-01-01	12.881600000000000
2000-01-01	13.004800000000000
2001-01-01	9.393889999999999
2002-01-01	9.278770000000000
2003-01-01	8.793400000000000
2004-01-01	7.305020000000000
2005-01-01	6.876430000000000
2006-01-01	6.765810000000001
2007-01-01	7.478480000000000
2008-01-01	7.517730000000000
2009-01-01	7.850750000000000
2010-01-01	7.904130000000000
2011-01-01	8.155300000000000
2012-01-01	7.864480000000000
2013-01-01	7.701490000000000
2014-01-01	8.009160000000001
2015-01-01	7.948710000000000
2016-01-01	8.378169999999999