Year	Number
1996	0.901294231414795
1998	0.902549386024475
2000	0.872710645198822
2002	0.834610283374786
2003	0.576729536056519
2004	0.374004453420639
2005	0.239869892597198
2006	0.170649603009224
2007	0.123870968818665
2008	-0.214934408664703
2009	-0.436706125736237
2010	-0.191209465265274
2011	-0.293437421321869
2012	-0.186561584472656
2013	-0.303844124078751
2014	-0.33936595916748
2015	-0.325764834880829
2016	-0.282985687255859
2017	-0.451421916484833
2018	-0.492414593696594
2019	-0.195732101798058
2020	-0.130924180150032
2021	0.324197560548782
2022	-0.134175449609756