Spain Imports of pebbles, gravel, flint, macadam of slag, tarred macadam from Liberia was US$1.28 Thousand during 2019, according to the United Nations COMTRADE database on international trade. Spain Imports of pebbles, gravel, flint, macadam of slag, tarred macadam from Liberia - data, historical chart and statistics - was last updated on June of 2024.