Year	Number
1996	-0.199152007699013
1998	-0.462085247039795
2000	-0.4848812520504
2002	-0.282606691122055
2003	-0.425413876771927
2004	-0.849328279495239
2005	-0.836270749568939
2006	-0.835813224315643
2007	-0.833615064620972
2008	-0.900729417800903
2009	-0.762323498725891
2010	-0.79597407579422
2011	-0.847473442554474
2012	-0.961209893226624
2013	-0.868806004524231
2014	-0.605925261974335
2015	-0.758396923542023
2016	-0.831983506679535
2017	-1.00361776351929
2018	-0.826392531394959
2019	-0.957518041133881
2020	-0.993326544761658
2021	-0.819578289985657
2022	-0.726116597652435