Year	Z-score
1996-01-01	11.930200000000000
1997-01-01	13.604000000000001
1998-01-01	15.554100000000000
1999-01-01	16.807300000000000
2000-01-01	15.304800000000000
2001-01-01	14.364000000000000
2002-01-01	15.158600000000000
2003-01-01	14.407200000000000
2004-01-01	15.251300000000000
2005-01-01	14.361900000000000
2006-01-01	11.415500000000000
2007-01-01	11.779300000000000
2008-01-01	13.339300000000000
2009-01-01	14.689200000000000
2010-01-01	14.923400000000000
2011-01-01	13.858200000000000
2012-01-01	16.761700000000000
2013-01-01	17.225900000000000
2014-01-01	17.857800000000000
2015-01-01	13.946700000000000
2016-01-01	14.729000000000001