Malawi Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Nigeria was US$66 during 2009, according to the United Nations COMTRADE database on international trade. Malawi Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Nigeria - data, historical chart and statistics - was last updated on May of 2024.