Subject Region
United States
488
China
218
Great Britain
154
Canada
136
Latin America
136
Africa
131
Mexico
86
Germany
82
India
81
France
78
Europe
76
Soviet Union
61
Russia (Federation)
60
Europe, Eastern
57
South Africa
53
Japan
52
Ireland
51
Brazil
48
Middle East
48
Southern States
41
Argentina
37
Cuba
36
Peru
35
New York (State)
34
Asia
32
Developing countries
31
Nigeria
31
Africa, Sub-Saharan
30
Asia, Central
28
Turkey
28
Egypt
27
European Union countries
26
New York
26
Central America
25
Korea (South)
25
Arab countries
24
Spain
24
Chile
23
Greece
23
Iran
23
Korea
23
New York (N.Y.)
22
Caribbean Area
21
Indonesia
20
America
19
Philippines
19
Zimbabwe
19
Africa, Southern
17
Europe, Central
17
Italy
17
more ...