Year	Number
1996	-0.101317152380943
1998	-0.20348159968853
2000	-0.172407656908035
2002	-0.417055726051331
2003	-0.479976803064346
2004	-0.414409548044205
2005	-0.377738356590271
2006	-0.33123853802681
2007	-0.372122079133987
2008	-0.434875011444092
2009	-0.445475101470947
2010	-0.355230033397675
2011	-0.364098519086838
2012	-0.445909202098846
2013	-0.434015780687332
2014	-0.549443066120148
2015	-0.580868721008301
2016	-0.298964887857437
2017	-0.308798342943192
2018	-0.098668172955513
2019	-0.106940247118473
2020	-0.16378065943718
2021	-0.422272920608521
2022	-0.447030484676361