Subject Region
United States
176
Africa
89
Papua New Guinea
76
India
67
China
66
Europe
60
Indonesia
57
Japan
51
Russia (Federation)
45
Great Britain
42
North America
41
Oceania
41
Southeast Asia
41
Spain
40
Mexico
38
Australia
36
France
34
Latin America
34
America
32
Brazil
31
Soviet Union
25
Africa, East
24
Asia
24
Canada
24
Kenya
24
Taiwan
24
Italy
23
Polynesia
22
New Guinea
21
Tanzania
21
Melanesia
20
South Africa
20
Germany
19
Africa, Southern
18
Colombia
18
Africa, Sub-Saharan
17
Peru
17
Greece
16
Hawaii
16
Philippines
16
Siberia
16
Ethiopia
15
Malaysia
15
South America
15
Congo (Democratic Republic)
14
East Asia
14
Ecuador
14
Europe, Eastern
14
Middle East
14
Alaska
13
more ...