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Information table issued by Countries
| Freq | Centrality | Year | Country/Region |
|---|---|---|---|
| 2631 | 0.63 | 2009 | USA |
| 1304 | 0 | 2013 | PEOPLES R CHINA |
| 411 | 0 | 2013 | JAPAN |
| 362 | 0.12 | 2013 | GERMANY |
| 284 | 1.08 | 2013 | ENGLAND |
| 219 | 0.06 | 2013 | SOUTH KOREA |
| 156 | 0.6 | 2012 | CANADA |
| 146 | 0.12 | 2012 | FRANCE |
| 131 | 0.06 | 2013 | NETHERLANDS |
| 119 | 0.06 | 2013 | INDIA |
