Year	Z-score
1996-01-01	7.2917399999999990
1997-01-01	7.3459300000000000
1998-01-01	7.3729900000000000
1999-01-01	7.2066399999999990
2000-01-01	7.5581200000000000
2001-01-01	7.5326400000000000
2002-01-01	7.5837100000000010
2003-01-01	7.9058100000000010
2004-01-01	7.6448800000000010
2005-01-01	7.6748199999999995
2006-01-01	7.3935100000000010
2007-01-01	7.8917699999999990
2008-01-01	6.1874300000000000
2009-01-01	7.0228399999999995
2010-01-01	6.9479700000000000
2011-01-01	6.7553199999999990
2012-01-01	6.9004900000000000
2013-01-01	7.0119000000000000
2014-01-01	7.0342600000000010
2015-01-01	6.3867800000000000
2016-01-01	6.8673699999999990