Country | Documents | Citable documents | Citations | Self-Citations | Citations per Document | H index | ||
---|---|---|---|---|---|---|---|---|
1 | United States | 20319 | 19992 | 1507252 | 616183 | 74.18 | 994 | |
2 | Japan | 7038 | 6980 | 361907 | 81509 | 51.42 | 490 |
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