Year	Z-score
1996-01-01	4.4540800000000000
1997-01-01	5.3320099999999995
1998-01-01	4.7073800000000010
1999-01-01	3.9087699999999996
2000-01-01	4.7008900000000000
2001-01-01	5.0715699999999995
2002-01-01	5.5459300000000000
2003-01-01	5.6870800000000000
2004-01-01	6.2209200000000000
2005-01-01	5.9676900000000000
2006-01-01	6.2513900000000000
2007-01-01	5.8742199999999990
2008-01-01	5.1171900000000000
2009-01-01	5.4807300000000000
2010-01-01	5.1396600000000000
2011-01-01	4.6843400000000000
2012-01-01	5.2953500000000000
2013-01-01	5.8768300000000000
2014-01-01	4.5382099999999990
2015-01-01	6.5067200000000000
2016-01-01	8.0413400000000000