Tonga Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Germany was US$14 during 2017, according to the United Nations COMTRADE database on international trade. Tonga Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Germany - data, historical chart and statistics - was last updated on February of 2026.