Region
Asia
4
East Asia
4
United States
3
Asia --
2
Middle East
2
Pacific Area
2
Southeast Asia
2
United States --
2
Africa, North
1
Asia, Southeastern
1
Asia, Southeastern --
1
East Asia --
1
Europe
1
Latin America
1
Latin America --
1
Malaysia
1
Middle East --
1
Singapore
1
Southeast Asia --
1
Soviet Union
1
Thailand
1