Year	Number
1996	-0.446042686700821
1998	-0.649806618690491
2000	-0.510619759559631
2002	-0.440713196992874
2003	-0.410669893026352
2004	-0.322501838207245
2005	-0.260543018579483
2006	-0.209158509969711
2007	-0.230330780148506
2008	-0.18621614575386
2009	-0.3098004758358
2010	-0.352394610643387
2011	-0.333498507738113
2012	-0.381443470716476
2013	-0.300762176513672
2014	-0.223876476287842
2015	-0.170360878109932
2016	-0.177830174565315
2017	-0.141028061509132
2018	-0.226688459515572
2019	-0.236526757478714
2020	-0.0982428416609764
2021	-0.0609265565872192
2022	0.0166723933070898