Region
China
United States
United States --
18
China --
17
Taiwan
4
Taiwan --
4
Japan
2
Japan --
2
Southeast Asia
2
Southeast Asia --
2
Asia --
1
Asia, Southeastern
1
Asia, Southeastern --
1
Burma --
1
East Asia
1
East Asia --
1
India
1
India --
1
Pacific Area --
1
Pacific area
1
Pacific area --
1
Pakistan
1
Pakistan --
1
Russia (Federation)
1
Russia (Federation) --
1
South Asia
1
South Asia --
1
Soviet Union
1
Soviet Union --
1
United states --
1