Region
Africa, Southern --
24
Africa, Southern
16
South Africa --
11
South Africa
6
United States --
2
Africa
1
Africa --
1
Africa, Central --
1
Africa, East --
1
Africa, Eastern
1
Africa, Northern
1
Caribbean Area --
1
Portugal --
1
Southern
1
Soviet Union --
1
United States
1
United states --
1
Zimbabwe
1