Year	Z-score
1996-01-01	27.466900000000000
1997-01-01	26.717000000000000
1998-01-01	23.610300000000000
1999-01-01	24.790500000000000
2000-01-01	23.541100000000000
2001-01-01	11.985800000000000
2002-01-01	6.581950000000000
2003-01-01	14.942700000000000
2004-01-01	24.605800000000000
2005-01-01	26.538300000000000
2006-01-01	25.153800000000000
2007-01-01	23.084200000000000
2008-01-01	22.929200000000000
2009-01-01	25.250999999999998
2010-01-01	26.283600000000000
2011-01-01	23.648800000000000
2012-01-01	25.109400000000000
2013-01-01	21.292300000000000
2014-01-01	21.590000000000000
2015-01-01	21.773900000000000
2016-01-01	22.126100000000000