Year	Number
1996	0.242076978087425
1998	0.332852572202683
2000	0.301593601703644
2002	0.472238034009933
2003	0.442828863859177
2004	0.38860946893692
2005	0.457679510116577
2006	0.500075697898865
2007	0.537074029445648
2008	0.5689857006073
2009	0.521999180316925
2010	0.571348905563354
2011	0.513676166534424
2012	0.477906197309494
2013	0.417426258325577
2014	0.471947550773621
2015	0.458866268396378
2016	0.451864898204803
2017	0.449006587266922
2018	0.37796550989151
2019	0.302083343267441
2020	0.28843942284584
2021	0.255604922771454
2022	0.214864358305931