Papua New Guinea Exports of coke, semi-coke of coal, of lignite, of peat; retort carbon to Indonesia was US$48 during 2019, according to the United Nations COMTRADE database on international trade. Papua New Guinea Exports of coke, semi-coke of coal, of lignite, of peat; retort carbon to Indonesia - data, historical chart and statistics - was last updated on May of 2024.