序号 | 数量 | 中心性 | 年份 | 机构/国家 |
1 | 86 | 0.79 | 2013 | USA |
2 | 65 | 0.51 | 2013 | ENGLAND |
3 | 61 | 0.45 | 2014 | PEOPLES R CHINA |
4 | 48 | 0.23 | 2013 | ITALY |
5 | 23 | 0.1 | 2014 | AUSTRALIA |
6 | 21 | 0.12 | 2014 | SPAIN |
7 | 17 | 0.08 | 2013 | CANADA |
8 | 15 | 0.15 | 2014 | GERMANY |
9 | 14 | 0.06 | 2013 | SOUTH KOREA |