Tertiary
| Level | 1st | 2nd | 3rd | 4th |
|---|---|---|---|---|
| 1 | β | β | β | β |
| 2 | β | β | β | β |
| 3 | 2 | β | β | β |
| 4 | 3 | β | β | β |
| 5 | 3 | β | β | β |
| 6 | 3 | β | β | β |
| 7 | 4 | 2 | β | β |
| 8 | 4 | 2 | β | β |
| 9 | 4 | 2 | β | β |
| 10 | 4 | 3 | β | β |
| 11 | 4 | 3 | β | β |
| 12 | 4 | 3 | β | β |
| 13 | 4 | 3 | 2 | β |
| 14 | 4 | 3 | 2 | β |
| 15 | 4 | 3 | 2 | β |
| 16 | 4 | 3 | 3 | β |
| 17 | 4 | 3 | 3 | β |
| 18 | 4 | 3 | 3 | β |
| 19 | 4 | 3 | 3 | 1 |
| 20 | 4 | 3 | 3 | 1 |