 Ikindi cyegeranyo, cyibanze ku bantu bari mu kigero kiri hagati yimyaka 18 kugera kuri 34 yamavuko, cyasanze umubare wisugi nimanzi wariyongereye cyane mu myaka 10 ishize: abagera hafi kuri 45 bavuze ko batarigera bakora imibonano mpuzabitsina na rimwe. 