Year	Number
1996	0.530793964862823
1998	0.509318709373474
2000	0.539500534534454
2002	0.699001014232636
2003	0.730082154273987
2004	0.313118994235992
2005	0.260035753250122
2006	0.279324263334274
2007	0.272402256727219
2008	0.215269222855568
2009	0.212331026792526
2010	0.20214432477951
2011	0.203772380948067
2012	0.207406997680664
2013	0.206574141979218
2014	0.222984209656715
2015	0.222495183348656
2016	0.302844405174255
2017	0.308629870414734
2018	0.307642549276352
2019	0.306420177221298
2020	0.337495654821396
2021	0.328474462032318
2022	0.308978110551834