Switzerland Imports from Poland of Bitumen and Asphalt (Natural), Bituminous or Oil Shale, Tar Sands was US$832 during 2016, according to the United Nations COMTRADE database on international trade. Switzerland Imports from Poland of Bitumen and Asphalt (Natural), Bituminous or Oil Shale, Tar Sands - data, historical chart and statistics - was last updated on May of 2024.