Year	Number
1996	0.840325474739075
1998	0.829069972038269
2000	0.72274261713028
2002	0.753255426883698
2003	0.743869483470917
2004	0.628187000751495
2005	0.556203484535217
2006	0.35609769821167
2007	0.191648334264755
2008	0.272778868675232
2009	0.417277067899704
2010	0.467300355434418
2011	0.403479129076004
2012	0.447511166334152
2013	0.53310090303421
2014	0.473634362220764
2015	0.491357654333115
2016	0.545390427112579
2017	0.492247939109802
2018	0.409032583236694
2019	0.451061338186264
2020	0.360985457897186
2021	0.326035767793655
2022	0.449057072401047