Year	Z-score
1999-01-01	5.3375699999999995
2000-01-01	5.6821300000000000
2001-01-01	13.8662000000000000
2002-01-01	8.3197300000000000
2003-01-01	8.9140000000000000
2004-01-01	7.3409400000000000
2005-01-01	9.8253300000000010
2006-01-01	10.0260000000000000
2007-01-01	11.4516000000000000
2008-01-01	11.4885000000000000
2009-01-01	11.8982000000000000
2010-01-01	12.5546000000000000
2011-01-01	11.5865000000000000
2012-01-01	11.9543000000000000
2013-01-01	11.9080000000000000
2014-01-01	11.0874000000000000