Year	Number
1996	0.703103303909302
1998	0.673875689506531
2000	0.687808454036713
2002	0.708452701568604
2003	0.724850833415985
2004	0.329279661178589
2005	0.316907852888107
2006	0.344496428966522
2007	0.348947823047638
2008	0.263817340135574
2009	0.266292542219162
2010	0.263567358255386
2011	0.211980611085892
2012	0.216097250580788
2013	0.215835079550743
2014	0.23662506043911
2015	0.232193902134895
2016	0.321833670139313
2017	0.323024958372116
2018	0.323131740093231
2019	0.322351813316345
2020	0.357103317975998
2021	0.363453030586243
2022	0.338811218738556