| Count | Prefix |
|---|---|
| 432 | 7- |
| 9 | 7. |
| 832 | 70 |
| 648 | 71 |
| 776 | 72 |
| 375 | 73 |
| 396 | 74 |
| 560 | 75 |
| 449 | 76 |
| 1,868 | 77 |
| 1,610 | 78 |
| 555 | 79 |
| 296 | 7a |
| 267 | 7b |
| 391 | 7c |
| 471 | 7d |
| 217 | 7e |
| 215 | 7f |
| 179 | 7g |
| 211 | 7h |
| 189 | 7i |
| 70 | 7j |
| 152 | 7k |
| 205 | 7l |
| 402 | 7m |
| 145 | 7n |
| 167 | 7o |
| 277 | 7p |
| 28 | 7q |
| 147 | 7r |
| 711 | 7s |
| 698 | 7t |
| 121 | 7u |
| 90 | 7v |
| 164 | 7w |
| 127 | 7x |
| 53 | 7y |
| 57 | 7z |