Subject Region
United States
62
Alberta
13
Calgary
12
Australia
9
China
9
India
9
Canada
7
Great Britain
6
Mexico
6
California
5
Developing countries
5
Japan
5
Africa
4
Ghana
4
Hong Kong
4
New York
4
New York (State)
4
San Francisco
4
Taiwan
4
Alaska
3
Bangladesh
3
Brazil
3
Egypt
3
Germany
3
Ireland
3
New York (N.Y.)
3
New Zealand
3
Nigeria
3
Spain
3
Tanzania
3
Zambia
3
Afghanistan
2
Africa, Sub-Saharan
2
Bolivia
2
British Columbia
2
Caribbean Area
2
Colombia
2
England
2
Former communist countries
2
France
2
Greece
2
Guangdong Sheng
2
Indiana
2
Korea (South)
2
Netherlands
2
Pakistan
2
Paraguay
2
Singapore
2
South Africa
2
Soviet Union
2
more ...