Region
United States
17
South Africa
3
Developing countries
2
Europe
2
Africa, Southern
1
Aruba
1
Canada
1
Central America
1
Cuba
1
Cyprus
1
El Salvador
1
Equatorial Guinea
1
Fiji
1
French Guiana
1
Germany (East)
1
Guadeloupe
1
Guinea-Bissau
1
Iraq
1
Liechtenstein
1
Malawi
1
Martinique
1
Mexico
1
Mozambique
1
Nauru
1
Netherlands Antilles
1
Samoa
1
San Marino
1
Sao Tome and Principe
1
Seychelles
1
Solomon Islands
1
Soviet Union
1
Sudan
1
Tonga
1
Turkey
1
Western Hemisphere
1
Yugoslavia
1