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- United States20,794
- China7,930
- Great Britain7,065
- Japan4,804
- Germany4,416
- France4,258
- Italy4,091
- Europe3,881
- Indonesia3,778
- Latin America3,385
- Mexico3,325
- Soviet Union3,029
- Africa3,004
- Brazil2,913
- Spain2,860
- Developing countries2,620
- Russia (Federation)2,263
- Argentina2,192
- Canada2,117
- South Africa1,802