Country | Documents | Citable documents | Citations | Self-Citations | Citations per Document | H index | ||
---|---|---|---|---|---|---|---|---|
1 | United States | 31371 | 30896 | 1331197 | 420516 | 42.43 | 1404 | |
2 | China | 8131 | 8105 | 71507 | 40590 | 8.79 | 678 | |
3 | Japan | 8122 | 8018 | 109855 | 27255 | 13.53 | 400 | |
4 | United Kingdom | 6868 | 6712 | 209448 | 37580 | 30.50 | 700 | |
5 | Germany | 6617 | 6520 | 152218 | 30531 | 23.00 | 640 |
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