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Subject (Region)
- United States3,126
- Great Britain434
- Germany289
- California260
- Italy214
- Japan208
- Soviet Union191
- China180
- France176
- Developing countries158
- England122
- Florida112
- Canada106
- India100
- Germany (West)95
- Washington (State)92
- Europe89
- New York (State)87
- Texas79
- Netherlands74