Die lara awon ifarahan arun yii ni ki awon fentiriku okan-eniyan tobi gan an ti bi i 20 si 30 ninu 100 si maa n yori si ki okan siwo-ise.. 
Ní ọdún 1982, ó di akọ̀wé àgbà ní ilé ìwòsàn náà kí  ó tó lọ sí òkè òkun (United Kingdom) fún fún ètò tí a mọ̀ sí Fellowship Program.. 