Year	Z-score
1996-01-01	17.350500000000000
1997-01-01	13.921100000000000
1998-01-01	13.229300000000000
1999-01-01	15.285900000000000
2000-01-01	16.941800000000000
2001-01-01	17.097000000000000
2002-01-01	15.688800000000000
2003-01-01	13.675999999999998
2004-01-01	29.506900000000000
2005-01-01	26.165400000000000
2006-01-01	18.627800000000000
2007-01-01	19.194500000000000
2008-01-01	18.688600000000000
2009-01-01	15.668500000000000
2010-01-01	17.861400000000000
2011-01-01	18.331200000000000
2012-01-01	20.178400000000000
2013-01-01	22.028200000000000
2014-01-01	21.640000000000000
2015-01-01	22.911100000000000
2016-01-01	22.560700000000000