| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.43/5 | 3.83/5 |
| Vol 2 | 2.41/5 | 4.55/5 |
| Vol 3 | 2.34/5 | 4.16/5 |
| Vol 4 | 2.39/5 | 3.78/5 |
| Vol 5 | 2.30/5 | 3.26/5 |
| Vol 6 | 2.56/5 | 3.78/5 |
| Vol 7 | 2.54/5 | 4.37/5 |
| Vol 8 | 2.31/5 | 4.14/5 |
| Vol 9 | 2.74/5 | 4.47/5 |
| Vol 10 | 2.45/5 | 3.73/5 |
| Vol 11 | 2.51/5 | 4.34/5 |
| Vol 12 | 2.61/5 | 4.12/5 |
| Vol 13 | 2.82/5 | 4.72/5 |
| Vol 14 | 2.76/5 | 4.73/5 |
| Vol 15 | 2.13/5 | 4.55/5 |
| Overall | 2.47/5 | 4.73/5 |