Switzerland Imports from Sri Lanka of Coke, Semi-coke of Coal, of Lignite, of Peat; Retort Carbon was US$142 during 2005, according to the United Nations COMTRADE database on international trade. Switzerland Imports from Sri Lanka of Coke, Semi-coke of Coal, of Lignite, of Peat; Retort Carbon - data, historical chart and statistics - was last updated on June of 2024.