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Subject (Region)
- Italy[remove]29
- France25
- Great Britain23
- Germany (to 1949; 1990- )21
- Belgium20
- China18
- Denmark17
- Spain17
- Netherlands16
- Japan14
- Portugal14
- Mexico13
- Greece12
- Norway12
- Russia (to 1921)12
- Switzerland12
- Argentina11
- Canada11
- Chile11
- Turkey11