Year	Number
1996	-1.52155113220215
1998	-1.46571433544159
2000	-1.16177678108215
2002	-1.34647178649902
2003	-1.0894900560379
2004	-1.12121140956879
2005	-1.12793004512787
2006	-1.10614681243896
2007	-1.13235282897949
2008	-1.07706034183502
2009	-1.06424653530121
2010	-1.01026976108551
2011	-0.977914988994598
2012	-1.01184451580048
2013	-1.06614553928375
2014	-1.0368640422821
2015	-1.06418442726135
2016	-1.11853158473969
2017	-1.10298001766205
2018	-1.10057985782623
2019	-1.06183338165283
2020	-1.07205772399902
2021	-1.15477156639099
2022	-1.19797742366791