Region
United States
366
Canada
6
Developing countries
6
Middle East
5
Alaska
4
Iran
4
Iraq
3
Kansas
3
Mexico
3
Saudi Arabia
3
America
2
Brazil
2
Europe
2
European Economic Community countries
2
Nevada
2
Ontario
2
Philippines
2
Russia (Federation)
2
Africa, North
1
Arab countries
1
Asia
1
California
1
Colombia
1
Denmark
1
Former Soviet republics
1
Gabon
1
Germany
1
Israel
1
Maryland
1
North America
1
Northeastern States
1
Oregon
1
Qatar
1
Rhode Island
1
Spain
1