Umwimbu wavyo waduze kugera ku toni miliyoni 2.87 mu 2015/2016 uvuye ku miliyoni 2.6 umwaka wahera kubera imvura ikwiye no gutanga hakiri kare ifumbire n'imbuto ku barimyi, kubw'amakuru y' itororokanirizo ry'amakuru Reuters.
