Year	Z-score
1996-01-01	5.778110000000000
1997-01-01	6.618310000000001
1998-01-01	6.013160000000000
1999-01-01	6.382870000000000
2000-01-01	6.972250000000000
2001-01-01	6.079540000000000
2002-01-01	4.776720000000000
2003-01-01	5.149230000000000
2004-01-01	4.954120000000000
2005-01-01	4.503340000000001
2006-01-01	5.307080000000000
2007-01-01	6.451350000000000
2008-01-01	7.129490000000000
2009-01-01	7.437040000000000
2010-01-01	8.685850000000000
2011-01-01	9.578060000000000
2012-01-01	10.098300000000000
2013-01-01	8.744080000000000
2014-01-01	9.378330000000000
2015-01-01	8.654370000000000
2016-01-01	8.913490000000000