Year	Number
1996	-0.625289618968964
1998	-0.793338298797607
2000	-1.00038921833038
2002	-0.931637406349182
2003	-0.920624613761902
2004	-0.994449377059937
2005	-0.890321433544159
2006	-0.857247531414032
2007	-0.887544631958008
2008	-0.97261369228363
2009	-0.838977217674255
2010	-0.737805545330048
2011	-0.9066281914711
2012	-0.883420169353485
2013	-0.855993092060089
2014	-0.75093001127243
2015	-0.776916742324829
2016	-0.815582871437073
2017	-0.733362674713135
2018	-0.683727979660034
2019	-0.688234627246857
2020	-0.712482035160065
2021	-0.658457338809967
2022	-0.672492206096649