Bulgaria Imports of pebbles, gravel, flint, macadam of slag, tarred macadam from Slovenia was US$4.61 Thousand during 2022, according to the United Nations COMTRADE database on international trade. Bulgaria Imports of pebbles, gravel, flint, macadam of slag, tarred macadam from Slovenia - data, historical chart and statistics - was last updated on May of 2024.