Region
United States
8
Asia
7
China
7
China --
7
United States --
7
Asia --
6
Congo (Democratic Republic) --
4
Europe, Eastern
4
Europe, Eastern --
4
Indonesia
4
Southeast Asia
4
Southeast Asia --
4
Congo (Democratic Republic)
3
East Asia
3
India
3
Indonesia --
3
Latin America
3
Vietnam (Democratic Republic) --
3
Yemen (People's Democratic Republic) --
3
Asia, Southeastern
2
Burma
2
East Asia --
2
Europe
2
India --
2
Iran
2
Iran --
2
Korea (South)
2
Korea (South) --
2
Latin America --
2
Malaysia
2
Malaysia --
2
Middle East
2
Soviet Union
2
Soviet Union --
2
Taiwan
2
Taiwan --
2
Yemen (People's Democratic Republic)
2
Yemen --
2
Afghanistan --
1
Africa
1
Africa --
1
Arab countries
1
Arab countries --
1
Asia, Central
1
Asia, Central --
1
Asia, Southeastern --
1
Belarus
1
Belarus --
1
Burma --
1
Caucasus
1
more ...