| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.67/5 | 4.06/5 |
| Vol 2 | 2.40/5 | 4.24/5 |
| Vol 3 | 2.95/5 | 4.29/5 |
| Vol 4 | 2.76/5 | 4.29/5 |
| Vol 5 | 2.85/5 | 4.43/5 |
| Vol 6 | 2.92/5 | 4.49/5 |
| Vol 7 | 2.90/5 | 4.27/5 |
| Vol 8 | 2.81/5 | 4.19/5 |
| Vol 9 | 2.83/5 | 4.12/5 |
| Vol 10 | 2.63/5 | 4.03/5 |
| Vol 11 | 3.04/5 | 4.39/5 |
| Vol 12 | 3.00/5 | 4.40/5 |
| Vol 13 | 2.67/5 | 3.84/5 |
| Vol 14 | 2.96/5 | 4.12/5 |
| Vol 15 | 2.94/5 | 4.32/5 |
| Overall | 2.82/5 | 4.49/5 |