| Value | Category |
|---|---|
| All the European states, East Asian | |
| America ( the American Institute for Peteroluim | |
| China | |
| Don't know | |
| From Shokoka company (south Africa) | |
| Gulf States, Ethiopia and Djibouti | |
| Korea , Egypt, china | |
| Local brand and Chinese brand | |
| Oman | |
| Yemen | |
| Yemen and Pakistan | |
| yemen |