| Lap | Position | Time | Pace |
|---|---|---|---|
| 1 | 2 | 18.294 | 20/6:05.880 |
| 2 | 1 | 18.176 | 20/6:04.700 |
| 3 | 2 | 18.352 | 20/6:05.480 |
| 4 | 2 | 18.423 | 20/6:06.225 |
| 5 | 2 | 18.262 | 20/6:06.028 |
| 6 | 2 | 18.595 | 20/6:07.007 |
| 7 | 4 | 20.326 | 20/6:12.651 |
| 8 | 3 | 18.459 | 20/6:12.217 |
| 9 | 3 | 18.102 | 20/6:11.087 |
| 10 | 3 | 19.815 | 20/6:13.608 |
| 11 | 3 | 18.632 | 20/6:13.520 |
| 12 | 4 | 18.561 | 20/6:13.328 |
| 13 | 4 | 18.343 | 20/6:12.831 |
| 14 | 4 | 19.141 | 20/6:13.544 |
| 15 | 4 | 18.485 | 20/6:13.288 |
| 16 | 4 | 19.816 | 20/6:14.727 |
| 17 | 4 | 19.563 | 20/6:15.700 |
| 18 | 3 | 18.626 | 20/6:15.523 |
| 19 | 3 | 18.854 | 20/6:15.605 |
| 20 | 3 | 18.778 | 20/6:15.603 |