Year	Z-score
2005-01-01	10.221300000000000
2006-01-01	8.487310000000000
2007-01-01	16.200300000000000
2008-01-01	7.208080000000001
2009-01-01	5.591870000000000
2010-01-01	5.536910000000000
2011-01-01	3.875690000000000
2012-01-01	5.248540000000000
2013-01-01	7.247630000000000
2014-01-01	5.645020000000000
2015-01-01	5.594710000000000
2016-01-01	4.935450000000000