Table 4.
Two-letter country codes used in this study.
| Code | Country name |
|---|---|
| AR | Argentina |
| BE | Belgium |
| BH | Bahrain |
| BI | Burundi |
| CA | Canada |
| CD | Democratic Republic of the Congo |
| CF | Central African Republic |
| CG | Republic of the Congo |
| CM | Cameroon |
| CY | Cyprus |
| DE | Germany |
| DK | Denmark |
| DZ | Algeria |
| EG | Egypt |
| ES | Spain |
| FR | France |
| GA | Gabon |
| GB | United Kingdom |
| IN | India |
| IR | Ireland |
| IT | Italy |
| JP | Japan |
| MQ | Martinique |
| NL | Netherlands |
| PK | Pakistan |
| PT | Portugal |
| RU | Russia |
| RW | Rwanda |
| SA | Saudi Arabia |
| SY | Syria |
| TN | Tunisia |
| UG | Uganda |
| US | United States of America |
| XX | Unknown |
| YE | Yemen |
| ZA | South Africa |