Year	Number
1996	-0.470392346382141
1998	0.0296584647148848
2000	-0.0785963833332062
2002	-0.252441436052322
2003	-0.379858076572418
2004	-0.391061931848526
2005	-0.623264193534851
2006	-0.66790372133255
2007	-0.43703019618988
2008	-0.527115523815155
2009	-0.308192104101181
2010	-0.496909588575363
2011	-0.390435367822647
2012	-0.350115597248077
2013	-0.438611596822739
2014	-0.534083962440491
2015	-0.472757905721664
2016	-0.437456160783768
2017	-0.565637230873108
2018	-0.531866431236267
2019	-0.569066166877747
2020	-0.448519617319107
2021	-0.627824068069458
2022	-0.552035331726074