Country | Documents | Citable documents | Citations | Self-Citations | Citations per Document | H index | ||
---|---|---|---|---|---|---|---|---|
1 | United States | 135712 | 129058 | 6307696 | 2933132 | 46.48 | 2017 | |
2 | Japan | 38107 | 37589 | 827428 | 206127 | 21.71 | 846 | |
3 | United Kingdom | 37123 | 33235 | 1498693 | 316551 | 40.37 | 1413 | |
4 | Germany | 31707 | 30849 | 921873 | 201691 | 29.07 | 1174 |
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