Region
- Soviet Union
- United States 9 results
- Europe, Eastern 6 results
- Middle East 4 results
- Russia 4 results
- Asia, Central 2 results
- Developing countries 2 results
- Europe 2 results
- Germany 2 results
- Great Britain 2 results
- New Zealand 2 results
- Afghanistan 1 results
- Africa, Sub-Saharan 1 results
- Angola 1 results
- Asia 1 results
- Central America 1 results
- Ethiopia 1 results
- Former Soviet republics 1 results
- Germany (East) 1 results
- India 1 results
- Mozambique 1 results
- Poland 1 results
- South Asia 1 results
- Ukraine 1 results
- Zimbabwe 1 results