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Top 10 countries by publication frequency and centrality.
| No. | Country | Frequency | Country | Centrality |
|---|---|---|---|---|
| 1 | USA | 1,882 | USA | 0.22 |
| 2 | Germany | 646 | France | 0.16 |
| 3 | Italy | 384 | Italy | 0.14 |
| 4 | China | 313 | England | 0.12 |
| 5 | France | 304 | Germany | 0.10 |
| 6 | England | 241 | Japan | 0.07 |
| 7 | South Korea | 234 | Australia | 0.05 |
| 8 | Japan | 233 | Canada | 0.04 |
| 9 | Australia | 223 | China | 0.01 |
| 10 | Canada | 188 | South Korea | 0.00 |
