Region
Asia
Asia --
11
Soviet Union
6
Soviet Union --
6
United States
5
United States --
5
Asia, Southeastern
1
Asia, Southeastern --
1
Europe
1
Europe --
1
France
1
France --
1
Korea
1
Korea --
1
Pacific Area
1
Pacific Area --
1
Pacific Ocean Region
1
Pacific Ocean Region --
1
Russia --
1
Soviet Union -1985-
1