| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.20/5 | 4.12/5 |
| Vol 2 | 3.15/5 | 3.90/5 |
| Vol 3 | 3.41/5 | 4.25/5 |
| Vol 4 | 3.27/5 | 3.99/5 |
| Vol 5 | 3.24/5 | 4.06/5 |
| Vol 6 | 3.02/5 | 3.98/5 |
| Vol 7 | 3.12/5 | 3.98/5 |
| Vol 8 | 3.26/5 | 4.04/5 |
| Vol 9 | 3.06/5 | 3.96/5 |
| Vol 10 | 3.16/5 | 4.05/5 |
| Vol 11 | 3.25/5 | 4.04/5 |
| Vol 12 | 3.16/5 | 3.90/5 |
| Vol 13 | 3.26/5 | 4.13/5 |
| Vol 14 | 3.08/5 | 3.94/5 |
| Vol 15 | 3.27/5 | 4.07/5 |
| Overall | 3.19/5 | 4.25/5 |