Spain Imports from Singapore of Pebbles, Gravel, Flint, Macadam of Slag, Tarred Macadam was US$102 during 2007, according to the United Nations COMTRADE database on international trade. Spain Imports from Singapore of Pebbles, Gravel, Flint, Macadam of Slag, Tarred Macadam - data, historical chart and statistics - was last updated on June of 2024.