Country | Documents | Citable documents | Citations | Self-Citations | Citations per Document | H index | ||
---|---|---|---|---|---|---|---|---|
1 | United States | 131337 | 126561 | 3969571 | 1657525 | 30.22 | 474 | |
2 | China | 107609 | 106591 | 1617132 | 1050596 | 15.03 | 289 | |
3 | Germany | 36173 | 34497 | 852765 | 192271 | 23.57 | 273 | |
4 | United Kingdom | 34458 | 32705 | 1108714 | 246961 | 32.18 | 309 |
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