Ukraine Exports of coke, semi-coke of coal, of lignite, of peat; retort carbon to Serbia was US$971.42 Thousand during 2016, according to the United Nations COMTRADE database on international trade. Ukraine 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.