Country | Documents | Citable documents | Citations | Self-Citations | Citations per Document | H index | ||
---|---|---|---|---|---|---|---|---|
1 | United States | 20877 | 20546 | 1520702 | 614813 | 72.84 | 994 | |
2 | Japan | 7119 | 7046 | 351305 | 78635 | 49.35 | 490 |
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