Country | Documents | Citable documents | Citations | Self-Citations | Citations per Document | H index | ||
---|---|---|---|---|---|---|---|---|
1 | United States | 155326 | 140323 | 8956403 | 3966338 | 57.66 | 2017 | |
2 | United Kingdom | 44071 | 37308 | 2302943 | 446125 | 52.26 | 1413 | |
3 | Japan | 38097 | 36748 | 1179337 | 247080 | 30.96 | 846 | |
4 | Germany | 36593 | 33627 | 1532083 | 299510 | 41.87 | 1174 |
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