Region
United States
563
Soviet Union
192
China
69
India
64
Indonesia
62
Japan
56
Africa
50
Russia (Federation)
48
Europe, Eastern
46
Great Britain
40
Europe
39
Canada
29
Germany
22
Latin America
21
Developing countries
20
Taiwan
20
Asia
15
Bulgaria
15
Thailand
15
Australia
13
Israel
13
Eastern Europe
12
Former Soviet republics
12
Iran
12
Outer space
12
Nigeria
11
Philippines
11
Middle East
10
Caribbean Area
9
Czechoslovakia
9
Eurasia
9
États-Unis
9
Foreign countries
9
Hungary
9
Mexico
9
Tropics
9
Turkey
9
Connecticut
8
Russia
8
Finland
7
France
7
Poland
7
South Africa
7
European Economic Community countries
6
Germany (West)
6
Ireland
6
Pakistan
6
Spain
6
Afrique
5
Arab countries
5
more ...