Year	Number
1996	0.111758477985859
1998	0.110406368970871
2000	-0.266555637121201
2002	0.0258806254714727
2003	-0.221844956278801
2004	-0.2694111764431
2005	-0.604816973209381
2006	-0.587645471096039
2007	-0.613750696182251
2008	-0.664763152599335
2009	-0.761497497558594
2010	-0.733134984970093
2011	-0.696974515914917
2012	-0.535095810890198
2013	-0.477977752685547
2014	-0.471893131732941
2015	-0.517446935176849
2016	-0.509768784046173
2017	-0.476011604070663
2018	-0.448486506938934
2019	-0.455313384532928
2020	-0.494477480649948
2021	-0.552942454814911
2022	-0.560807108879089