Year	Z-score
2002-01-01	4.079530000000000
2003-01-01	4.565680000000000
2004-01-01	10.889300000000000
2005-01-01	8.387310000000001
2006-01-01	9.836730000000001
2007-01-01	8.761930000000000
2008-01-01	9.884990000000000
2009-01-01	10.927800000000000
2010-01-01	10.276200000000000
2011-01-01	10.447200000000000
2012-01-01	11.418200000000000
2013-01-01	11.133600000000000
2014-01-01	11.289100000000000
2015-01-01	5.074870000000000
2016-01-01	3.647650000000000