Namibia Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Hong Kong was US$1.09 Thousand during 2016, according to the United Nations COMTRADE database on international trade. Namibia Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Hong Kong - data, historical chart and statistics - was last updated on May of 2024.