| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.70/5 | 3.86/5 |
| Vol 2 | 2.67/5 | 3.74/5 |
| Vol 3 | 2.79/5 | 4.11/5 |
| Vol 4 | 2.79/5 | 3.99/5 |
| Vol 5 | 2.61/5 | 3.57/5 |
| Vol 6 | 2.69/5 | 4.08/5 |
| Vol 7 | 2.83/5 | 4.21/5 |
| Vol 8 | 2.74/5 | 4.06/5 |
| Vol 9 | 2.73/5 | 3.94/5 |
| Vol 10 | 2.97/5 | 4.23/5 |
| Vol 11 | 3.02/5 | 4.33/5 |
| Vol 12 | 2.84/5 | 4.10/5 |
| Vol 13 | 3.05/5 | 4.31/5 |
| Vol 14 | 2.67/5 | 3.79/5 |
| Vol 15 | 2.69/5 | 4.06/5 |
| Vol 16 | 2.73/5 | 3.89/5 |
| Vol 17 | 2.76/5 | 4.02/5 |
| Vol 18 | 2.63/5 | 3.81/5 |
| Vol 19 | 2.47/5 | 2.84/5 |
| Vol 20 | 2.74/5 | 3.99/5 |
| Vol 21 | 2.56/5 | 3.49/5 |
| Vol 22 | 2.61/5 | 3.76/5 |
| Vol 23 | 2.65/5 | 3.98/5 |
| Vol 24 | 2.48/5 | 2.85/5 |
| Overall | 2.74/5 | 4.33/5 |