Year	Z-score
1996-01-01	9.843010000000001
1997-01-01	8.267080000000000
1998-01-01	8.069580000000000
1999-01-01	11.752000000000000
2000-01-01	12.398300000000000
2001-01-01	10.595999999999998
2002-01-01	12.493100000000000
2003-01-01	12.540600000000000
2004-01-01	15.125500000000000
2005-01-01	14.592100000000000
2006-01-01	15.937000000000001
2007-01-01	15.667300000000000
2008-01-01	17.658400000000000
2009-01-01	15.518100000000000
2010-01-01	14.987200000000000
2011-01-01	15.581100000000000
2012-01-01	16.956200000000000
2013-01-01	17.291800000000000
2014-01-01	17.497100000000000
2015-01-01	18.392800000000000
2016-01-01	18.990100000000000