Region
Africa
2
Africa, North
9
Africa, Sub-Saharan
10
Asia
7
China
8
East Asia
1
Eastern Europe
2
Europe
7
Europe, Eastern
4
Former Soviet republics
2
Latin America
4
Middle East
11
Middle East Region
1
North Africa
2
Oceania
1
Oceania Region
1
Pacific Area
4
South Asia
8
Southeast Asia
1
Soviet Union
6
Sub-Saharan Africa
4
United States
4