Year	Number
1996	-1.16629016399384
1998	-1.24434244632721
2000	-1.11005222797394
2002	-1.04466021060944
2003	-1.07671809196472
2004	-0.802059054374695
2005	-0.715685963630676
2006	-0.916875541210175
2007	-0.984122395515442
2008	-0.979712247848511
2009	-1.03841888904572
2010	-1.02233076095581
2011	-1.00412118434906
2012	-0.906026601791382
2013	-0.893353223800659
2014	-0.813357710838318
2015	-0.847575545310974
2016	-0.861592352390289
2017	-0.902944028377533
2018	-0.995128452777863
2019	-1.05331110954285
2020	-1.0879522562027
2021	-1.00932395458221
2022	-1.00387418270111