Year	Number
1996	-0.424003124237061
1998	-0.390381544828415
2000	-0.534364283084869
2002	-0.499133259057999
2003	-0.642179369926453
2004	-0.613359034061432
2005	-0.534635305404663
2006	-0.618245720863342
2007	-0.512877285480499
2008	-0.487182706594467
2009	-0.428717106580734
2010	-0.436986297369003
2011	-0.496196299791336
2012	-0.569021642208099
2013	-0.602598667144775
2014	-0.669381856918335
2015	-0.779341638088226
2016	-0.902694940567017
2017	-0.857985019683838
2018	-0.808722257614136
2019	-0.858943164348602
2020	-0.774722814559937
2021	-0.818972706794739
2022	-0.836388111114502