Region
Africa
1
Asia
2
Australia
1
Canada
4
Developing countries
1
East Asia
1
England
1
Eugene
1
Europe
3
Government policy
1
Great Britain
1
India
1
Ireland
1
Islamic countries
1
Israel
1
Japan
2
Latin America
2
Netherlands
1
New Zealand
1
North America
3
Oregon
1
United States
67
Vietnam
1
West (U.S.)
1