Slovakia Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Switzerland was US$1.79 Thousand during 2019, according to the United Nations COMTRADE database on international trade. Slovakia Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Switzerland - data, historical chart and statistics - was last updated on May of 2024.