Year	Number
1996	0.0762425139546394
1998	-0.148121446371078
2000	-0.165955796837807
2002	-0.045844204723835
2003	-0.387829571962357
2004	-0.340702801942825
2005	-0.254883080720901
2006	-0.365333080291748
2007	-0.489185214042664
2008	-0.21551288664341
2009	-0.552714586257935
2010	-0.593583285808563
2011	-0.496339857578278
2012	-0.473695427179337
2013	-0.425235688686371
2014	-0.403887659311295
2015	-0.482573121786118
2016	-0.502166569232941
2017	-0.365349918603897
2018	-0.329337120056152
2019	-0.134347766637802
2020	-0.0613858476281166
2021	0.0218494012951851
2022	-0.00124927773140371