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