Namibia Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Switzerland was US$2.51 Thousand during 2014, according to the United Nations COMTRADE database on international trade. Namibia Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Switzerland - data, historical chart and statistics - was last updated on May of 2024.