| Value | Category |
|---|---|
| 1 | kouilou |
| 2 | niari |
| 3 | lékoumou |
| 4 | bouenza |
| 5 | pool |
| 6 | plateaux |
| 7 | cuvette |
| 8 | cuvette-ouest |
| 9 | sangha |
| 10 | likouala |
| 11 | brazzaville |
| 12 | pointe-noire |
| 13 | dolisie, mossendjo |
| 14 | sibiti |
| 15 | nkayi |
| 16 | kinkala, mindouli |
| 17 | djambala, gamboma |
| 18 | owando, oyo |
| 19 | ewo, etoumbi |
| 20 | ouesso, pokola |
| 21 | impfondo, dongou |