Year	Number
1996	0.703103303909302
1998	0.673875689506531
2000	0.687808454036713
2002	0.708452701568604
2003	0.724850833415985
2004	0.329279661178589
2005	0.269058734178543
2006	0.291174799203873
2007	0.291047483682632
2008	0.227027013897896
2009	0.217067569494247
2010	0.206191405653954
2011	0.208437204360962
2012	0.212113365530968
2013	0.211183175444603
2014	0.23662506043911
2015	0.228245660662651
2016	0.316371381282806
2017	0.310353696346283
2018	0.320821762084961
2019	0.319254696369171
2020	0.353418558835983
2021	0.363453030586243
2022	0.338811218738556