Year	Number
1996	-0.68858790397644
1998	-0.732602536678314
2000	-0.917780160903931
2002	-0.624333381652832
2003	-0.563986718654633
2004	-0.408371657133102
2005	-0.696387231349945
2006	-0.580952644348145
2007	-0.427722543478012
2008	-0.367063492536545
2009	-0.255941480398178
2010	-0.279453217983246
2011	-0.202177077531815
2012	-0.26892501115799
2013	-0.323875933885574
2014	-0.0489184409379959
2015	0.0282399524003267
2016	0.0298212617635727
2017	0.0987358614802361
2018	0.0806501731276512
2019	-0.0621441006660461
2020	-0.154880329966545
2021	-0.0353600680828094
2022	0.0650628432631493