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Subject (Region)
- United States8,490
- Great Britain335
- Germany215
- China214
- California194
- Italy168
- Japan155
- France148
- Canada144
- Europe129
- European Union countries128
- Spain121
- India116
- Brazil80
- Russia (Federation)80
- Taiwan80
- Australia76
- South Africa73
- Developing countries66
- Outer space66