Country | Documents | Citable documents | Citations | Self-Citations | Citations per Document | H index | ||
---|---|---|---|---|---|---|---|---|
1 | United States | 139313 | 109262 | 4309134 | 1854746 | 30.93 | 483 | |
2 | Japan | 41588 | 38692 | 623876 | 139305 | 15.00 | 222 | |
3 | United Kingdom | 40255 | 32180 | 1440240 | 296286 | 35.78 | 381 |
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