| Lap | Position | Time | Pace |
|---|---|---|---|
| 1 | 2 | 17.374 | 21/6:04.854 |
| 2 | 2 | 17.605 | 21/6:07.279 |
| 3 | 2 | 17.521 | 21/6:07.500 |
| 4 | 1 | 17.581 | 21/6:07.925 |
| 5 | 2 | 17.803 | 21/6:09.113 |
| 6 | 2 | 17.844 | 21/6:10.048 |
| 7 | 2 | 17.727 | 21/6:10.365 |
| 8 | 3 | 19.448 | 21/6:15.120 |
| 9 | 3 | 17.842 | 21/6:15.072 |
| 10 | 4 | 17.577 | 21/6:14.476 |
| 11 | 3 | 18.678 | 21/6:16.091 |
| 12 | 3 | 18.338 | 21/6:16.841 |
| 13 | 3 | 18.698 | 20/6:00.055 |
| 14 | 3 | 17.523 | 21/6:17.338 |
| 15 | 3 | 17.560 | 21/6:16.767 |
| 16 | 3 | 17.606 | 21/6:16.327 |
| 17 | 3 | 20.414 | 20/6:01.340 |
| 18 | 3 | 19.197 | 20/6:02.596 |
| 19 | 3 | 19.126 | 20/6:03.644 |
| 20 | 3 | 18.013 | 20/6:03.475 |