Switzerland Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Greece was US$2.01 Thousand during 2021, according to the United Nations COMTRADE database on international trade. Switzerland Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Greece - data, historical chart and statistics - was last updated on June of 2024.