Year	Number
1996	-0.505626380443573
1998	-0.419251918792725
2000	-0.0151580581441522
2002	0.18799877166748
2003	0.224566981196404
2004	0.226076111197472
2005	0.0242626424878836
2006	-0.0207497254014015
2007	0.537623465061188
2008	0.524418473243713
2009	-0.0271528363227844
2010	-0.296562105417252
2011	-0.251826196908951
2012	-0.0128763783723116
2013	-0.441554099321365
2014	-1.13474333286285
2015	-1.15174031257629
2016	-0.684034168720245
2017	-0.500023603439331
2018	-0.34075191617012
2019	-0.286907196044922
2020	-0.378693789243698
2021	-0.477292448282242
2022	-0.412224322557449