Areas
West Asia
Asia (except West Asia)
Europe
Oceania
North America
South America
Africa
Number of nodes
6
9
9
2
2
4
1
Symbol representation
| Areas | West Asia | Asia (except West Asia) | Europe | Oceania | North America | South America | Africa |
| Number of nodes | 6 | 9 | 9 | 2 | 2 | 4 | 1 |
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