Year	Z-score
1996-01-01	22.2392
1997-01-01	20.9443
1998-01-01	20.4119
1999-01-01	19.8554
2000-01-01	24.5073
2001-01-01	25.8824
2002-01-01	21.2629
2003-01-01	25.8497
2004-01-01	33.6243
2005-01-01	34.7314
2006-01-01	31.2775
2007-01-01	29.9131
2008-01-01	28.2217
2009-01-01	47.7282
2010-01-01	51.2003
2011-01-01	64.4264
2012-01-01	49.1146
2013-01-01	43.4508
2014-01-01	34.7629
2015-01-01	55.1044
2016-01-01	24.9067