Year	Z-score
1996-01-01	21.058400000000000
1997-01-01	21.023000000000003
1998-01-01	22.072200000000000
1999-01-01	19.069000000000003
2000-01-01	19.629500000000000
2001-01-01	18.996100000000000
2002-01-01	17.194900000000000
2003-01-01	13.886800000000000
2004-01-01	13.079900000000000
2005-01-01	14.761000000000000
2006-01-01	14.744100000000000
2007-01-01	15.994900000000000
2008-01-01	9.324910000000001
2009-01-01	14.001000000000000
2010-01-01	16.381500000000000
2011-01-01	15.111500000000000
2012-01-01	16.881400000000000
2013-01-01	20.488600000000000
2014-01-01	21.759500000000000
2015-01-01	23.085100000000000
2016-01-01	24.172600000000000