Tonga Imports of pebbles, gravel, flint, macadam of slag, tarred macadam from China was US$65 during 2017, according to the United Nations COMTRADE database on international trade. Tonga Imports of pebbles, gravel, flint, macadam of slag, tarred macadam from China - data, historical chart and statistics - was last updated on April of 2026.