Papua New Guinea Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Thailand was US$16 during 2020, according to the United Nations COMTRADE database on international trade. Papua New Guinea Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Thailand - data, historical chart and statistics - was last updated on May of 2024.