Subject Region
United States
3,423
China
1,178
Great Britain
1,152
Mexico
620
Developing countries
608
Europe
602
Africa
542
Latin America
540
India
465
Japan
420
Venezuela
379
Canada
355
England
352
France
318
Asia
310
Germany
299
Soviet Union
299
Southern States
245
Europe, Eastern
235
Ireland
231
Russia (Federation)
228
Spain
227
South Africa
185
East Asia
170
Brazil
167
Middle East
167
New York (State)
160
Caribbean Area
154
Italy
144
Argentina
142
Southeast Asia
142
European Union countries
141
Africa, Sub-Saharan
134
Greece
123
Pacific Area
119
Peru
118
Pennsylvania
115
Egypt
113
Cuba
112
California
110
New York
109
Nigeria
106
Scotland
105
Rome
100
Espana
98
Turkey
97
Colombia
93
Indonesia
92
Australia
91
Korea (South)
86
more ...