Table 2.
The Top Five Active Countries/Regions
| Country | Counts | Country | Centrality |
|---|---|---|---|
| Peoples R China | 65 | United States | 0.36 |
| United States | 47 | Peoples R China | 0.32 |
| South Korea | 29 | England | 0.15 |
| Spain | 24 | Spain | 0.1 |
| England | 15 | Australia | 0.06 |
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