Year	Z-score
1996-01-01	10.495999999999999
1997-01-01	15.169400000000000
1998-01-01	16.034300000000000
1999-01-01	17.871700000000000
2000-01-01	17.404100000000000
2001-01-01	17.535400000000000
2002-01-01	18.637800000000000
2003-01-01	20.372500000000000
2004-01-01	19.453400000000000
2005-01-01	24.269400000000000
2006-01-01	27.404100000000000
2007-01-01	27.378200000000000
2008-01-01	18.461900000000000
2009-01-01	21.276999999999997
2010-01-01	21.198000000000000
2011-01-01	20.163100000000000
2012-01-01	20.706900000000000
2013-01-01	21.104300000000000
2014-01-01	19.900900000000000
2015-01-01	20.088700000000000
2016-01-01	19.132200000000000