Year	Number
1996	-0.745139956474304
1998	-0.72986114025116
2000	-0.733604550361633
2002	-0.716065526008606
2003	-0.588587760925293
2004	-0.412591546773911
2005	-0.6291663646698
2006	-0.205525189638138
2007	0.00706776836887002
2008	0.108792886137962
2009	0.108438961207867
2010	0.365169644355774
2011	0.362672299146652
2012	0.559880137443542
2013	0.62512743473053
2014	0.776300489902496
2015	0.597625195980072
2016	0.618455648422241
2017	0.607264578342438
2018	0.535657405853271
2019	0.521026968955994
2020	0.528032600879669
2021	0.573205888271332
2022	0.561202585697174