Year	Number
1996	-0.510079205036163
1998	-0.648276090621948
2000	-0.766920447349548
2002	-0.877513706684113
2003	-0.82736998796463
2004	-1.04911208152771
2005	-0.641119778156281
2006	-0.479762464761734
2007	-0.537263751029968
2008	-0.599021852016449
2009	-0.584045112133026
2010	-0.61335825920105
2011	-0.647816777229309
2012	-0.722233474254608
2013	-0.705004990100861
2014	-0.688540935516357
2015	-0.645115256309509
2016	-0.662416398525238
2017	-0.612676680088043
2018	-0.667998254299164
2019	-0.687235057353973
2020	-0.764765918254852
2021	-0.761585533618927
2022	-0.886412620544434