Mu bihugu biza ku isonga mu kugira abagabo bafite ibitsina birebire ku isi harimo Congo ,Ecuador, Ghana ,Colombia ndetse n’ibindi .

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Mu cyegeranyo cyakozwe na Kaminuza yo muri Amerika yitwa ‘University of Ulster’ iherereye mu majyaruguru ya Ireland cyakoze icyegeranyo cy’ ibihugu bibarizwamo abagabo bafite ibitsina birebire ku isi hose .

Muriki cyegeranyo cyakozwe niyi Kaminuza yo muri Amerika ngo intego nyamukuru yari ukureba niba umugabane wa abatuye muri Afurika koko bafite umubare munini w’abagabo bafite ibitsina binini kurusha abatuye iburayi nkuko byavugwaga, ngo ubushakashatsi bwerekanye ko Afurika ifite abagabo barusha abanyaburayi ubugabo burebure.

Ikindi nuko bifashishije ingeri z’abantu batandukanye aho bagiye basura bimwe mu bihugu byo ku isi mu rwego rwo gupima ndetse no gukusanya amakuru mpamo ashingiye ku buzima by’imyororokere yabo .

Dore ibihugu bibarizwamo abagabo bafite ibitsina birebire ku isi :
• Congo – 7.1 inches – 17.93 cm

• Ecuador – 6.9 inches – 17.77 cm

• Ghana – 6.7 inches – 17.31 cm

• Colombia – 6.7 inches – 17.03 cm

• Venezuela – 6.7 inches- 17.03 cm

• Lebanon – 6.6 inches – 16.82 cm

• Cameroon – 6.5 inches – 16.67 cm

• Bolivia – 6.5 inches – 16.51 cm

• Hungary – 6.5 inches – 16.51 cm