Which country has sent the highest number of visiting personnel to the ISS according to the provided visitor data?

Answer

United States

The United States has sent 163 individuals to the station, far surpassing Russia (57) and all other visiting nations, reflecting its status as the largest financial and hardware contributor.

Which country has sent the highest number of visiting personnel to the ISS according to the provided visitor data?
SpaceISSspace explorationInternational Cooperation