Zambia Exports of coke, semi-coke of coal, of lignite, of peat; retort carbon to Burundi was US$18.13 Thousand during 2023, according to the United Nations COMTRADE database on international trade. Zambia Exports of coke, semi-coke of coal, of lignite, of peat; retort carbon to Burundi - data, historical chart and statistics - was last updated on May of 2024.