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Subject (Region)
- United States4,273
- Great Britain1,247
- Germany1,086
- Japan1,073
- France1,004
- China949
- Italy677
- Indonesia653
- Mexico566
- Soviet Union561
- India466
- Brazil364
- Canada305
- Europe304
- Spain288
- Developing countries274
- Russia (Federation)273
- England258
- South Africa219
- Poland210