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TOP10 countries in the HEN study.
| Ranking | County | Count | Centrality |
|---|---|---|---|
| 1 | USA | 302 | 0.21 |
| 2 | ENGLAND | 135 | 0.26 |
| 3 | SPAIN | 118 | 0.11 |
| 4 | ITALY | 97 | 0.01 |
| 5 | FRANCE | 82 | 0.01 |
| 6 | AUSTRALIA | 62 | 0.06 |
| 7 | PEOPLES R CHINA | 60 | 0.00 |
| 8 | JAPAN | 58 | 0.00 |
| 9 | CANADA | 53 | 0.11 |
| 10 | BRAZIL | 45 | 0.02 |
