Switzerland Imports from Canada of Bitumen and Asphalt (Natural), Bituminous or Oil Shale, Tar Sands was US$93 during 2014, according to the United Nations COMTRADE database on international trade. Switzerland Imports from Canada of Bitumen and Asphalt (Natural), Bituminous or Oil Shale, Tar Sands - data, historical chart and statistics - was last updated on May of 2024.