Year	Z-score
1996-01-01	7.217980000000001
1997-01-01	8.233780000000000
1998-01-01	9.941260000000000
1999-01-01	13.853600000000000
2000-01-01	12.367100000000000
2001-01-01	13.378400000000000
2002-01-01	11.544700000000000
2003-01-01	10.355600000000000
2004-01-01	10.106100000000000
2005-01-01	11.532900000000000
2006-01-01	12.815500000000000
2007-01-01	13.731500000000000
2008-01-01	14.030500000000000
2009-01-01	15.335600000000000
2010-01-01	15.145999999999999
2011-01-01	16.923800000000000
2012-01-01	17.253700000000000
2013-01-01	14.340100000000000
2014-01-01	14.276700000000000
2015-01-01	14.101600000000000
2016-01-01	13.107800000000000