Year	Z-score
1996-01-01	26.404900000000000
1997-01-01	25.104300000000000
1998-01-01	27.111700000000000
1999-01-01	25.543000000000003
2000-01-01	25.235500000000000
2001-01-01	25.753400000000000
2002-01-01	29.861600000000000
2003-01-01	29.297800000000000
2004-01-01	29.844400000000000
2005-01-01	25.779400000000000
2006-01-01	24.740000000000000
2007-01-01	25.024900000000000
2008-01-01	27.999000000000002
2009-01-01	28.277700000000000
2010-01-01	27.646500000000000
2011-01-01	26.819800000000000
2012-01-01	26.729300000000000
2013-01-01	26.110400000000000
2014-01-01	26.309900000000000
2015-01-01	30.538800000000000
2016-01-01	30.997400000000000