Region
China
4
China --
4
United States
4
United States --
4
ASEAN countries --
1
Asia, Central --
1
Asia, central --
1
Europe --
1
European Economic Community countries
1
European Economic Community countries --
1
Japan
1
Japan --
1
Korea (North)
1
Korea (North) --
1
Korea (South)
1
Korea (South) --
1
Western countries
1
Western countries --
1