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Subject (Region)
- United States15,803
- China1,257
- Great Britain1,036
- Japan917
- Developing countries839
- Europe749
- Germany694
- Italy564
- France481
- Canada476
- India466
- Soviet Union437
- European Union countries339
- Africa334
- Indonesia312
- Latin America304
- Mexico301
- Russia (Federation)292
- Spain275
- Asia231