Country | Documents | Citable documents | Citations | Self-Citations | Citations per Document | H index | ||
---|---|---|---|---|---|---|---|---|
1 | United States | 21372 | 20475 | 1515505 | 647298 | 70.91 | 1073 | |
2 | Japan | 5346 | 5277 | 259330 | 49459 | 48.51 | 517 |
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