Colombia Exports of coke, semi-coke of coal, of lignite, of peat; retort carbon to Singapore was US$3.77 Million during 2022, according to the United Nations COMTRADE database on international trade. Colombia Exports of coke, semi-coke of coal, of lignite, of peat; retort carbon to Singapore - data, historical chart and statistics - was last updated on June of 2024.