The number of 'Bubble' places depends on the number of entrants.
| Entrants | Bubble Protection Candidates |
| 10 - 99 | 1 |
| 100 - 499 | 2 |
| 500 - 999 | 3 |
| 1000 - 1999 | 4 |
| 2000 - 2999 | 5 |
| 3000 - 3999 | 6 |
| 4000 - 5999 | 7 |
| 6000 - 7999 | 8 |
| 8000 - 9999 | 9 |
| 10000+ | 10 |
The number of 'Bubble' places depends on the number of entrants.
| Entrants | Bubble Protection Candidates |
| 10 - 99 | 1 |
| 100 - 499 | 2 |
| 500 - 999 | 3 |
| 1000 - 1999 | 4 |
| 2000 - 2999 | 5 |
| 3000 - 3999 | 6 |
| 4000 - 5999 | 7 |
| 6000 - 7999 | 8 |
| 8000 - 9999 | 9 |
| 10000+ | 10 |