Year	Z-score
1996-01-01	21.531900000000000
1997-01-01	21.881999999999998
1998-01-01	22.399900000000000
1999-01-01	23.234200000000000
2000-01-01	23.127200000000000
2001-01-01	24.542100000000000
2002-01-01	25.229600000000000
2003-01-01	25.175300000000000
2004-01-01	27.227700000000000
2005-01-01	27.156100000000000
2006-01-01	27.254600000000000
2007-01-01	26.141000000000000
2008-01-01	22.576000000000000
2009-01-01	26.477400000000000
2010-01-01	28.467600000000000
2011-01-01	28.803900000000000
2012-01-01	28.887800000000000
2013-01-01	29.036500000000000
2014-01-01	29.196400000000000
2015-01-01	29.431200000000000
2016-01-01	29.083400000000000