Slovenia Exports of coke, semi-coke of coal, of lignite, of peat; retort carbon to Serbia was US$68.14 Thousand during 2023, according to the United Nations COMTRADE database on international trade. Slovenia Exports of coke, semi-coke of coal, of lignite, of peat; retort carbon to Serbia - data, historical chart and statistics - was last updated on May of 2024.