Year	Number
1996	-1.0403960943222
1998	-1.13391411304474
2000	-1.33590936660767
2002	-1.20396292209625
2003	-1.35355937480927
2004	-1.30168402194977
2005	-1.33819544315338
2006	-1.28037881851196
2007	-1.18676173686981
2008	-1.13619911670685
2009	-1.07293176651001
2010	-1.01609683036804
2011	-0.97883015871048
2012	-0.832189977169037
2013	-0.85806941986084
2014	-0.880769193172455
2015	-0.845904052257538
2016	-0.756473004817963
2017	-0.751458883285522
2018	-0.824817895889282
2019	-0.756039798259735
2020	-0.840734362602234
2021	-0.908926069736481
2022	-0.987142562866211