| Count | Prefix |
|---|---|
| 313 | cb- |
| 29 | cb. |
| 8 | cb0 |
| 39 | cb1 |
| 35 | cb2 |
| 17 | cb3 |
| 30 | cb4 |
| 5 | cb5 |
| 8 | cb6 |
| 11 | cb7 |
| 7 | cb8 |
| 11 | cb9 |
| 872 | cba |
| 257 | cbb |
| 1,184 | cbc |
| 829 | cbd |
| 461 | cbe |
| 296 | cbf |
| 249 | cbg |
| 303 | cbh |
| 665 | cbi |
| 99 | cbj |
| 136 | cbk |
| 373 | cbl |
| 587 | cbm |
| 335 | cbn |
| 402 | cbo |
| 328 | cbp |
| 22 | cbq |
| 704 | cbr |
| 1,588 | cbs |
| 584 | cbt |
| 219 | cbu |
| 93 | cbv |
| 213 | cbw |
| 64 | cbx |
| 81 | cby |
| 30 | cbz |