| Count | Prefix |
|---|---|
| 1 | 1 |
| 2,621 | 1- |
| 43 | 1. |
| 16,761 | 10 |
| 3,826 | 11 |
| 9,481 | 12 |
| 2,196 | 13 |
| 1,641 | 14 |
| 1,547 | 15 |
| 2,009 | 16 |
| 1,629 | 17 |
| 7,274 | 18 |
| 2,428 | 19 |
| 1,400 | 1a |
| 887 | 1b |
| 1,495 | 1c |
| 841 | 1d |
| 544 | 1e |
| 632 | 1f |
| 560 | 1g |
| 607 | 1h |
| 458 | 1i |
| 217 | 1j |
| 436 | 1k |
| 538 | 1l |
| 1,008 | 1m |
| 542 | 1n |
| 578 | 1o |
| 1,051 | 1p |
| 133 | 1q |
| 519 | 1r |
| 6,251 | 1s |
| 1,011 | 1t |
| 374 | 1u |
| 299 | 1v |
| 1,492 | 1w |
| 747 | 1x |
| 113 | 1y |
| 161 | 1z |