| Count | Prefix |
|---|---|
| 453 | 7- |
| 10 | 7. |
| 868 | 70 |
| 674 | 71 |
| 811 | 72 |
| 394 | 73 |
| 416 | 74 |
| 586 | 75 |
| 468 | 76 |
| 1,927 | 77 |
| 1,642 | 78 |
| 573 | 79 |
| 309 | 7a |
| 281 | 7b |
| 408 | 7c |
| 490 | 7d |
| 222 | 7e |
| 231 | 7f |
| 187 | 7g |
| 217 | 7h |
| 202 | 7i |
| 72 | 7j |
| 165 | 7k |
| 219 | 7l |
| 413 | 7m |
| 157 | 7n |
| 171 | 7o |
| 292 | 7p |
| 28 | 7q |
| 163 | 7r |
| 754 | 7s |
| 711 | 7t |
| 127 | 7u |
| 98 | 7v |
| 170 | 7w |
| 133 | 7x |
| 57 | 7y |
| 62 | 7z |