| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.78/5 | 4.44/5 |
| Vol 2 | 3.10/5 | 4.48/5 |
| Vol 3 | 3.07/5 | 4.60/5 |
| Vol 4 | 2.89/5 | 4.54/5 |
| Vol 5 | 2.98/5 | 4.58/5 |
| Vol 6 | 2.85/5 | 4.32/5 |
| Vol 7 | 2.92/5 | 4.14/5 |
| Vol 8 | 2.82/5 | 4.26/5 |
| Vol 9 | 2.46/5 | 3.74/5 |
| Vol 10 | 2.39/5 | 3.13/5 |
| Vol 11 | 2.50/5 | 4.02/5 |
| Overall | 2.82/5 | 4.60/5 |