| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.39/5 | 3.80/5 |
| Vol 2 | 2.60/5 | 4.51/5 |
| Vol 3 | 2.26/5 | 4.27/5 |
| Vol 4 | 2.05/5 | 3.16/5 |
| Vol 5 | 2.10/5 | 3.20/5 |
| Vol 6 | 2.06/5 | 3.63/5 |
| Vol 7 | 2.13/5 | 4.05/5 |
| Vol 8 | 2.17/5 | 3.20/5 |
| Vol 9 | 2.15/5 | 4.30/5 |
| Vol 10 | 2.61/5 | 4.49/5 |
| Vol 11 | 2.41/5 | 3.90/5 |
| Vol 12 | 2.45/5 | 4.42/5 |
| Vol 13 | 2.63/5 | 4.42/5 |
| Vol 14 | 2.32/5 | 3.55/5 |
| Vol 15 | 3.49/5 | 4.74/5 |
| Vol 16 | 2.43/5 | 4.16/5 |
| Overall | 2.58/5 | 4.74/5 |