Year	Z-score
1996-01-01	5.2123099999999996
1997-01-01	5.3488200000000000
1998-01-01	8.1082500000000000
1999-01-01	6.5981600000000010
2000-01-01	8.3758800000000000
2001-01-01	8.9216500000000000
2002-01-01	10.0342000000000000
2003-01-01	9.8400699999999990
2004-01-01	9.1860699999999990
2005-01-01	8.1283300000000000
2006-01-01	9.0507300000000000
2007-01-01	9.5534100000000010
2008-01-01	12.0966000000000000
2009-01-01	16.8912000000000000
2010-01-01	18.3336000000000000
2011-01-01	18.9736000000000000
2012-01-01	19.5271000000000000
2013-01-01	19.5815000000000000
2014-01-01	17.9358000000000000
2015-01-01	19.0771000000000000
2016-01-01	21.0660000000000000