Year	Z-score
1996-01-01	6.279780000000001
1997-01-01	7.610589999999999
1998-01-01	11.801100000000000
1999-01-01	16.256000000000000
2000-01-01	16.149600000000000
2001-01-01	12.094100000000000
2002-01-01	8.293980000000000
2003-01-01	11.863500000000000
2004-01-01	15.099900000000000
2005-01-01	15.228600000000000
2006-01-01	16.137100000000000
2007-01-01	18.469200000000000
2008-01-01	17.830200000000000
2009-01-01	20.242800000000000
2010-01-01	18.966300000000000
2011-01-01	14.566900000000000
2012-01-01	16.964600000000000
2013-01-01	15.965300000000000
2014-01-01	12.462000000000000
2015-01-01	14.610200000000000
2016-01-01	15.546300000000000