Year	Z-score
1996-01-01	13.618800000000000
1997-01-01	12.572700000000000
1998-01-01	15.428600000000000
1999-01-01	14.892200000000000
2000-01-01	21.249800000000000
2001-01-01	24.081600000000000
2002-01-01	22.440200000000000
2003-01-01	21.206400000000000
2004-01-01	18.843700000000000
2005-01-01	17.138100000000000
2006-01-01	18.349800000000000
2007-01-01	17.566800000000000
2008-01-01	18.456300000000000
2009-01-01	19.150000000000000
2010-01-01	18.792100000000000
2011-01-01	16.493700000000000
2012-01-01	15.170500000000000
2013-01-01	18.949500000000000
2014-01-01	20.568900000000000
2015-01-01	22.262100000000000
2016-01-01	22.833000000000002