Year	Number
1996	-0.489798933267593
1998	-0.491153985261917
2000	-0.584863126277924
2002	-0.560990810394287
2003	-0.49087256193161
2004	-0.756660282611847
2005	-0.7295823097229
2006	-0.747617363929749
2007	-0.630165636539459
2008	-0.711532890796661
2009	-0.545064032077789
2010	-0.622543275356293
2011	-0.614729940891266
2012	-0.532105982303619
2013	-0.482674777507782
2014	-0.438092947006226
2015	-0.457813322544098
2016	-0.489483952522278
2017	-0.628040134906769
2018	-0.511549293994904
2019	-0.545818030834198
2020	-0.37394705414772
2021	-0.307860314846039
2022	-0.287282675504684