Year	Number
1996	0.187617555260658
1998	0.302315533161163
2000	0.331546425819397
2002	0.295856952667236
2003	0.361106097698212
2004	0.376263976097107
2005	0.296854168176651
2006	0.24671696126461
2007	0.332813501358032
2008	0.350792974233627
2009	0.276905655860901
2010	0.296465128660202
2011	0.287503004074097
2012	0.275722324848175
2013	0.263921529054642
2014	0.296172291040421
2015	0.330853641033173
2016	0.282597362995148
2017	0.333829998970032
2018	0.330506831407547
2019	0.296385109424591
2020	0.311764776706696
2021	0.311789244413376
2022	0.320023983716965