Year	Z-score
1996-01-01	10.951600000000000
1997-01-01	13.574300000000000
1998-01-01	14.129600000000000
1999-01-01	12.679400000000000
2000-01-01	13.412100000000000
2001-01-01	12.163800000000000
2002-01-01	12.216200000000000
2003-01-01	13.642800000000000
2004-01-01	14.978000000000000
2005-01-01	15.154000000000002
2006-01-01	16.099600000000000
2007-01-01	15.512300000000000
2008-01-01	18.096000000000000
2009-01-01	17.331300000000000
2010-01-01	17.883100000000000
2011-01-01	17.576300000000000
2012-01-01	17.715000000000000
2013-01-01	17.865800000000000
2014-01-01	17.115200000000000
2015-01-01	17.030800000000000
2016-01-01	18.171900000000000