Country | Documents | Citable documents | Citations | Self-Citations | Citations per Document | H index | ||
---|---|---|---|---|---|---|---|---|
1 | United States | 21354 | 20844 | 1554552 | 680336 | 72.80 | 1073 | |
2 | Japan | 5426 | 5367 | 282759 | 56524 | 52.11 | 517 |
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