| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.93/5 | 4.16/5 |
| Vol 2 | 3.03/5 | 4.35/5 |
| Vol 3 | 2.76/5 | 4.00/5 |
| Vol 4 | 2.97/5 | 4.16/5 |
| Vol 5 | 2.82/5 | 4.25/5 |
| Vol 6 | 2.92/5 | 4.08/5 |
| Vol 7 | 2.87/5 | 4.08/5 |
| Vol 8 | 2.93/5 | 4.08/5 |
| Vol 9 | 2.87/5 | 3.93/5 |
| Vol 10 | 2.92/5 | 4.12/5 |
| Vol 11 | 2.62/5 | 3.81/5 |
| Vol 12 | 2.90/5 | 4.12/5 |
| Vol 13 | 3.11/5 | 4.27/5 |
| Vol 14 | 2.86/5 | 3.95/5 |
| Vol 15 | 3.19/5 | 4.25/5 |
| Vol 16 | 2.90/5 | 3.87/5 |
| Vol 17 | 2.65/5 | 3.73/5 |
| Vol 18 | 3.07/5 | 4.14/5 |
| Vol 19 | 2.90/5 | 4.17/5 |
| Vol 20 | 2.86/5 | 4.00/5 |
| Overall | 2.90/5 | 4.35/5 |