Year	Number
1996	0.480888694524765
1998	0.453148931264877
2000	0.461006760597229
2002	0.427986711263657
2003	0.395839601755142
2004	0.393849045038223
2005	0.340958386659622
2006	0.398741275072098
2007	0.308911830186844
2008	0.297634989023209
2009	0.244014859199524
2010	0.25070509314537
2011	0.250233918428421
2012	0.269011974334717
2013	0.260900974273682
2014	0.256683349609375
2015	0.250381499528885
2016	0.299287557601929
2017	0.246166571974754
2018	0.281422942876816
2019	0.284793734550476
2020	0.26276308298111
2021	0.30851623415947
2022	0.307066679000854