Year	Z-score
1996-01-01	11.752600000000000
1997-01-01	12.197900000000000
1998-01-01	7.635650000000000
1999-01-01	12.298400000000000
2000-01-01	15.073400000000000
2001-01-01	13.120400000000000
2002-01-01	13.516200000000000
2003-01-01	13.305100000000000
2004-01-01	15.155999999999999
2005-01-01	14.328100000000000
2006-01-01	12.295600000000000
2007-01-01	12.356100000000000
2008-01-01	13.198200000000000
2009-01-01	13.186000000000000
2010-01-01	13.726700000000000
2011-01-01	18.800000000000000
2012-01-01	17.443300000000000
2013-01-01	17.264500000000000
2014-01-01	17.889300000000000
2015-01-01	14.997100000000000
2016-01-01	16.313200000000000