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Subject (Region)
- United States8,454
- Great Britain332
- Germany214
- China211
- California190
- Italy168
- Japan153
- Canada144
- France144
- European Union countries128
- Europe127
- Spain121
- India114
- Russia (Federation)81
- Brazil80
- Taiwan80
- Australia75
- South Africa73
- Outer space66
- Developing countries65