Year	Number
2004	0.497606158256531
2005	0.368987888097763
2006	0.360797524452209
2007	0.376145482063293
2008	0.390816241502762
2009	0.402511686086655
2010	0.393958419561386
2011	0.386368304491043
2012	0.358625292778015
2013	0.362132906913757
2014	0.177999645471573
2015	0.15120430290699
2016	0.121528759598732
2017	-0.273579508066177
2018	-0.306241989135742
2019	-0.325278997421265
2020	0.525310516357422
2021	0.534613013267517
2022	0.545899748802185