Region
United States
673
China
27
Former Soviet republics
19
Vietnam
15
Belarus
12
Bulgaria
11
Romania
10
Mongolia
9
Africa South of the Sahara
8
Africa, Sub-Saharan
8
Russia (Federation)
8
Albania
7
Canada
6
Chile
6
Singapore
5
Turkmenistan
5
Central America
4
Hungary
4
Korea (South)
4
Mexico
4
North America
4
South Africa
4
Andes Region
3
Caribbean Area
3
Jordan
3
Morocco
3
Afghanistan
2
Australia
2
California
2
Cambodia
2
Czechoslovakia
2
Dominican Republic
2
Egypt
2
Europe, Eastern
2
European Economic Community countries
2
Gaza Strip
2
Japan
2
Libya
2
Moldova
2
Montenegro
2
Nigeria
2
Pacific Ocean
2
Serbia
2
West Bank
2
Alaska
1
Algeria
1
Argentina
1
Armenia (Republic)
1
Asia, Eastern
1
Atlantic Ocean
1
more ...