Year	Z-score
1997-01-01	32.780600000000000
1998-01-01	8.431230000000001
1999-01-01	23.627800000000000
2000-01-01	16.254000000000000
2001-01-01	12.042500000000000
2002-01-01	13.027999999999999
2003-01-01	11.094400000000000
2004-01-01	9.704920000000000
2005-01-01	11.251200000000000
2006-01-01	10.036700000000000
2007-01-01	11.145500000000000
2008-01-01	13.728000000000000
2009-01-01	14.490100000000000
2010-01-01	15.053900000000000
2011-01-01	15.857200000000000
2012-01-01	15.979800000000000
2013-01-01	15.812300000000000
2014-01-01	15.720700000000000
2015-01-01	16.592700000000000
2016-01-01	17.550000000000000