Year	Number
1996	-0.655014395713806
1998	-0.683503091335297
2000	-0.765444338321686
2002	-0.646826028823853
2003	-0.522455036640167
2004	-0.649457633495331
2005	-0.721390843391418
2006	-0.601572275161743
2007	-0.61301189661026
2008	-0.680911064147949
2009	-0.491859823465347
2010	-0.499165296554565
2011	-0.407697647809982
2012	-0.663967430591583
2013	-0.666100203990936
2014	-0.650558888912201
2015	-0.593085110187531
2016	-0.685213208198547
2017	-0.706250250339508
2018	-0.605169057846069
2019	-0.558125436306
2020	-0.576169431209564
2021	-0.428103357553482
2022	-0.484884023666382