Region
Korea --
2
South Africa
2
South Africa --
2
Soviet Union --
2
Asia
1
Asia --
1
Bhutan --
1
Developing countries
1
Developing countries --
1
Indonesia --
1
Japan --
1
Korea
1
Melanesia --
1
Middle East --
1
Oceania
1
Oceania --
1
Russia --
1
South Asia
1
South Asia --
1
Soviet Union
1
Switzerland
1
Switzerland --
1
United States
1
United States --
1