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Subject (Region)
- United States6,840
- Europe679
- Developing countries609
- European Union countries464
- Mexico412
- China396
- Latin America326
- Canada323
- Africa309
- Great Britain304
- Japan300
- France248
- Russia (Federation)241
- Soviet Union218
- Germany197
- Outer space186
- India179
- Italy176
- Asia166
- Brazil165