Pave paine kufambira mberi kukuru mune zvedzidzo: Vanga vari 1800 vachiri 88 muzana vasingagoni kuverenga, nhamba iyi 2014 yadonha kusvika 15 muzana. Nekudaro, kuchine nyika dzakatenderedza 30 muzana neNigeria, semuenzaniso. Chikamu chedzidzo chakakwira zvakaipisisa: iyo graph inoratidza iyo yakakodzera chikoro mhando zvichienderana nehuwandu hwakazara (iyo wimbi zvakare inoratidza kuvandudza kwehuwandu hwevanhu vepasi) kusanganisira iyo IIASA fungidziro kusvika pagore 2100.