Botswana Exports of bitumen and asphalt (natural), bituminous or oil shale, tar sands to United States was US$3 during 2019, according to the United Nations COMTRADE database on international trade. Botswana Exports of bitumen and asphalt (natural), bituminous or oil shale, tar sands to United States - data, historical chart and statistics - was last updated on May of 2024.