Year	Number
1996	-0.289027005434036
1998	-0.29883337020874
2000	-0.160908803343773
2002	-0.464417785406113
2003	-0.567470014095306
2004	-0.59398877620697
2005	-0.633165061473846
2006	-0.667670607566834
2007	-0.716383755207062
2008	-0.670076966285706
2009	-0.649876177310944
2010	-0.630146682262421
2011	-0.638167917728424
2012	-0.540954291820526
2013	-0.375771909952164
2014	-0.444160997867584
2015	-0.462051779031754
2016	-0.459403544664383
2017	-0.382606446743011
2018	-0.55536687374115
2019	-0.607284188270569
2020	-0.669014096260071
2021	-0.757836818695068
2022	-0.615311503410339