| Count | Prefix |
|---|---|
| 432 | ib- |
| 28 | ib. |
| 3 | ib0 |
| 10 | ib1 |
| 29 | ib2 |
| 10 | ib3 |
| 14 | ib4 |
| 3 | ib5 |
| 5 | ib6 |
| 3 | ib7 |
| 12 | ib8 |
| 4 | ib9 |
| 1,773 | iba |
| 363 | ibb |
| 818 | ibc |
| 313 | ibd |
| 3,090 | ibe |
| 210 | ibf |
| 236 | ibg |
| 154 | ibh |
| 2,245 | ibi |
| 61 | ibj |
| 140 | ibk |
| 474 | ibl |
| 606 | ibm |
| 327 | ibn |
| 1,260 | ibo |
| 280 | ibp |
| 18 | ibq |
| 1,041 | ibr |
| 1,219 | ibs |
| 375 | ibt |
| 1,307 | ibu |
| 67 | ibv |
| 120 | ibw |
| 56 | ibx |
| 98 | iby |
| 56 | ibz |