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Subject (Region)
- United States15,723
- China1,253
- Great Britain1,032
- Japan904
- Developing countries837
- Europe739
- Germany683
- Italy562
- France478
- Canada468
- India463
- Soviet Union436
- European Union countries340
- Africa330
- Indonesia312
- Latin America302
- Mexico298
- Russia (Federation)291
- Spain273
- Brazil230