Region
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Norway
2
Pacific Area
4
Papua New Guinea
1
Paraguay
1
Pays de la CEE
2
Pa⩳es subdesarrollados
1
Persian Gulf States
1
Philippines
1
Poland
4
Rome
5
Russia
1
Russia (Federation)
6
Rwanda
1
Sao Tome and Principe
1
Serbia
1
Sierra Leone
1
Solomon Islands
1
South Africa
3
South America
1
Southeast Asia
1
Southern Cone of South America
1
Southern States
1
Soviet Union
1
Spain
5
Sri Lanka
1
Sudan
1
Sweden
2
Switzerland
5
Tanzania
1
Tonga
1
Turkey
2
USA
1
Uganda
1
Ukraine
4
United States
1,053
Vietnam
2