Rwanda Exports of niobium, tantalum, vanadium or zirconium ores and concentrates to Uganda was US$1.68 Million during 2014, according to the United Nations COMTRADE database on international trade. Rwanda Exports of niobium, tantalum, vanadium or zirconium ores and concentrates to Uganda - data, historical chart and statistics - was last updated on May of 2024.