Year	Number
1996	0.348834574222565
1998	0.320545703172684
2000	0.275541752576828
2002	0.355229288339615
2003	0.335184574127197
2004	0.329279661178589
2005	0.269058734178543
2006	0.291174799203873
2007	0.291047483682632
2008	0.227027013897896
2009	0.217067569494247
2010	0.208098173141479
2011	0.210870772600174
2012	0.214618623256683
2013	0.213676050305367
2014	0.24153795838356
2015	0.236625075340271
2016	0.338359475135803
2017	0.338475435972214
2018	0.333388537168503
2019	0.330409914255142
2020	0.365459054708481
2021	0.372372329235077
2022	0.347348541021347