Year	Number
1996	-0.331750810146332
1998	-0.385090172290802
2000	-0.283675938844681
2002	-0.505115449428558
2003	-0.177865669131279
2004	-0.0782668963074684
2005	-0.0903711244463921
2006	-0.0927100256085396
2007	-0.230410188436508
2008	-0.256853848695755
2009	-0.188876047730446
2010	-0.160913214087486
2011	-0.172698855400085
2012	0.0215807761996984
2013	0.138814523816109
2014	0.2846839427948
2015	0.274601668119431
2016	0.295233637094498
2017	0.264818489551544
2018	0.228967398405075
2019	0.167866066098213
2020	0.0556677877902985
2021	0.0104059325531125
2022	0.0137373208999634