Year	Z-score
1996-01-01	2.25656
1997-01-01	5.70857
1998-01-01	10.08130
1999-01-01	10.23820
2000-01-01	7.80800
2001-01-01	15.37640
2002-01-01	13.83800
2003-01-01	15.16240
2004-01-01	15.42850
2005-01-01	12.27060
2006-01-01	13.83900
2007-01-01	18.42110
2008-01-01	17.11250
2009-01-01	18.01570
2010-01-01	24.30890
2011-01-01	28.42880
2012-01-01	21.00000
2013-01-01	14.69050
2014-01-01	13.49910
2015-01-01	19.51530
2016-01-01	16.02880