| Ranking | Countries/Regions | Publications | Percentage of the Total Publications (%) |
| 1 | The United States | 113 | 91.13 |
| 2 | Canada | 5 | 4.03 |
| 3 | France | 4 | 3.22 |
| 4 | Australia | 2 | 1.61 |
| 4 | Iceland | 2 | 1.61 |
| 5 | The United Kingdom | 1 | 0.80 |
| 5 | New Zealand | 1 | 0.80 |
| 5 | Mainland China | 1 | 0.80 |
| 5 | Spain | 1 | 0.80 |
| 5 | Switzerland | 1 | 0.80 |
| 5 | Oman | 1 | 0.80 |
| 5 | Thailand | 1 | 0.80 |