Year	Number
1996	0.0112921837717295
1998	0.389240354299545
2000	-0.428261280059814
2002	-0.156634762883186
2003	-0.131324723362923
2004	-0.219342857599258
2005	-0.401479870080948
2006	-0.369664698839188
2007	-0.0149540305137634
2008	-0.267933160066605
2009	-0.583599746227264
2010	-0.381340742111206
2011	-0.0492937490344048
2012	0.0464904792606831
2013	0.000808572047390044
2014	-0.158987760543823
2015	-0.326045989990234
2016	-0.305498778820038
2017	-0.314989507198334
2018	-0.402226477861404
2019	-0.387309908866882
2020	-0.340128064155579
2021	-0.205342084169388
2022	-0.668324410915375