Year	Z-score
1996-01-01	7.048830000000001
1997-01-01	8.937920000000000
1998-01-01	15.105700000000000
1999-01-01	11.277200000000000
2000-01-01	11.099400000000000
2001-01-01	11.931500000000000
2002-01-01	12.965000000000000
2003-01-01	12.532400000000000
2004-01-01	13.298000000000000
2005-01-01	18.456500000000000
2006-01-01	15.766400000000000
2007-01-01	19.115400000000000
2008-01-01	16.403000000000000
2009-01-01	19.729000000000000
2010-01-01	19.958300000000000
2011-01-01	12.713400000000000
2012-01-01	15.747000000000000
2013-01-01	14.756100000000000
2014-01-01	14.876400000000000
2015-01-01	15.203100000000000
2016-01-01	15.441400000000000