Country boundaries: Natural Earth (public domain), via world-atlas 2.0.2 (ISC).
https://github.com/topojson/world-atlas
Country centres and ISO codes: mledoze/countries (ODbL).
https://github.com/mledoze/countries
https://opendatacommons.org/licenses/odbl/
The map displays country-level record counts. Markers are country centres, not company office locations. Small territories remain accessible through the country list.