Year	Number
1996	0.681182622909546
1998	0.624520897865295
2000	0.568725228309631
2002	0.454926639795303
2003	0.50964617729187
2004	0.439104020595551
2005	0.446039795875549
2006	0.332138866186142
2007	0.358851343393326
2008	0.462065756320953
2009	0.517221808433533
2010	0.630121886730194
2011	0.596360862255096
2012	0.657871425151825
2013	0.659764289855957
2014	0.769473612308502
2015	0.741432785987854
2016	0.652008235454559
2017	0.550634860992432
2018	0.546931207180023
2019	0.512944579124451
2020	0.324414283037186
2021	0.254857361316681
2022	0.25948902964592