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- United States25,346
- Great Britain17,628
- China5,513
- England5,195
- India4,896
- Europe4,782
- France3,711
- Japan2,244
- South Africa2,126
- Africa2,123
- Canada1,998
- Germany1,927
- Soviet Union1,848
- Maine1,752
- European Union countries1,723
- Italy1,666
- Waldo Patent1,662
- East Asia1,651
- Developing countries1,576
- Asia1,538