Region
European Economic Community countries --
12
European Economic Community countries
7
United States
7
United States --
5
Europe --
3
Asia, Southeastern --
2
Japan
2
Japan --
2
ASEAN countries
1
ASEAN countries --
1
Asia, Southeastern
1
Developing countries --
1
European Economic
1
European economic community countries
1
Hong Kong (China) --
1
Korea (South) --
1
Taiwan --
1
U.S --
1