Kammala jumla mai zuwa: Kafin 2011 akwai wasu cikakkun hanyoyin jirgin karkashin kasa don yajin aiki na wucewa (Janairu 1<unk>13, 1966, Afrilu 1<unk>11, 1980, Disamba 20<unk>22, 2005) da kashe wuta (Nuwamba 9<unk>10, 1965, Yuli 13<unk>14, 1977,
14 ga watan Agusta zuwa 16 ga watan Agusta, 2003).