Year	Z-score
1996-01-01	13.367300000000000
1997-01-01	13.274500000000000
1998-01-01	13.203500000000000
1999-01-01	13.865700000000000
2000-01-01	14.296400000000000
2001-01-01	14.024200000000000
2002-01-01	13.762600000000000
2003-01-01	14.388500000000000
2004-01-01	16.275400000000000
2005-01-01	17.763300000000000
2006-01-01	17.408300000000000
2007-01-01	16.826300000000000
2008-01-01	11.111100000000000
2009-01-01	14.384500000000000
2010-01-01	17.602300000000000
2011-01-01	17.569000000000003
2012-01-01	16.688400000000000
2013-01-01	15.216600000000000
2014-01-01	15.152300000000000
2015-01-01	15.492200000000000
2016-01-01	15.826700000000000