Year	Number
1996	0.688413977622986
1998	0.716092944145203
2000	0.655752897262573
2002	0.702703297138214
2003	0.544806301593781
2004	0.433262318372726
2005	0.389575779438019
2006	0.31153592467308
2007	0.274766087532043
2008	0.417219996452332
2009	0.399278730154037
2010	0.317414134740829
2011	0.498547106981277
2012	0.534359633922577
2013	0.613574981689453
2014	0.65126621723175
2015	0.614114046096802
2016	0.81918078660965
2017	0.767983138561249
2018	0.77433305978775
2019	0.808057069778442
2020	0.876260638237
2021	0.799450576305389
2022	0.836642742156982