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The top 10 productive countries in GM/CC
| Rank | Countries | Np | TC | H-index |
|---|---|---|---|---|
| 1 | China | 308 | 10,082 | 49 |
| 2 | USA | 202 | 14,676 | 51 |
| 3 | Italy | 58 | 2,480 | 22 |
| 4 | Japan | 53 | 1,284 | 21 |
| 5 | Australia | 42 | 2,386 | 21 |
| 6 | France | 39 | 4,510 | 22 |
| 7 | India | 38 | 626 | 15 |
| 8 | England | 34 | 1,827 | 18 |
| 9 | Netherlands | 31 | 1,594 | 16 |
| 10 | Spain | 29 | 1,785 | 14 |
