Year	Number
1996	-0.271189510822296
1998	-0.353955000638962
2000	-0.208548709750175
2002	-0.557897567749023
2003	-0.395265489816666
2004	-0.565061569213867
2005	-0.617887735366821
2006	-0.51888769865036
2007	-0.599234640598297
2008	-0.526307642459869
2009	-0.519456624984741
2010	-0.570009887218475
2011	-0.514727592468262
2012	-0.438275933265686
2013	-0.35578978061676
2014	-0.337421417236328
2015	-0.299674153327942
2016	-0.267868012189865
2017	-0.291190564632416
2018	-0.286587774753571
2019	-0.312405079603195
2020	-0.0709566846489906
2021	0.030393473803997
2022	0.0159702487289906