Hang-hang 55% e felle theko ea hau ea pele
1964, bopaki ba silevera 1992–2018: silevera ea 90%, 10% koporo.; Bopaki ba silevera 2019-: 99.9% silevera 1965-1970, lichelete tsa tšepe tse entsoeng ka 1776-1976 San Francisco: karolo e ka ntle ea silevera ea 80%, 20% ea koporo e pota-potileng 79% ea koporo, 21% silevera, e leng 60% koporo, 40% silevera.; Litlhaselo tsa potoloho, 1971 ho hlahisa: lesela le ka ntle la 75% la koporo, 25% ea nickel e pota-potileng mokokotlo oa 100% oa koporo.
Fumana Khoutu