| Lap | Position | Time | Pace |
|---|---|---|---|
| 1 | 5 | 18.381 | 20/6:07.062 |
| 2 | 5 | 18.254 | 20/6:06.035 |
| 3 | 3 | 18.445 | 20/6:07.002 |
| 4 | 3 | 18.237 | 20/6:06.585 |
| 5 | 3 | 18.634 | 20/6:07.804 |
| 6 | 3 | 18.703 | 20/6:08.846 |
| 7 | 3 | 18.342 | 20/6:08.056 |
| 8 | 3 | 18.543 | 20/6:08.847 |
| 9 | 3 | 18.743 | 20/6:09.515 |
| 10 | 4 | 18.654 | 20/6:09.872 |
| 11 | 3 | 18.727 | 20/6:10.296 |
| 12 | 4 | 18.592 | 20/6:10.425 |
| 13 | 4 | 19.026 | 20/6:11.201 |
| 14 | 4 | 18.712 | 20/6:11.418 |
| 15 | 4 | 18.462 | 20/6:11.273 |
| 16 | 4 | 18.775 | 20/6:11.537 |
| 17 | 4 | 18.682 | 20/6:11.661 |
| 18 | 4 | 18.949 | 20/6:12.067 |
| 19 | 4 | 19.187 | 20/6:12.682 |
| 20 | 4 | 20.794 | 20/6:14.842 |