| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.97/5 | 4.49/5 |
| Vol 2 | 3.82/5 | 4.44/5 |
| Vol 3 | 3.92/5 | 4.47/5 |
| Vol 4 | 3.48/5 | 4.31/5 |
| Vol 5 | 3.73/5 | 4.41/5 |
| Vol 6 | 3.61/5 | 4.36/5 |
| Vol 7 | 3.62/5 | 4.39/5 |
| Vol 8 | 3.63/5 | 4.37/5 |
| Vol 9 | 3.72/5 | 4.41/5 |
| Vol 10 | 3.82/5 | 4.44/5 |
| Vol 11 | 3.67/5 | 4.38/5 |
| Vol 12 | 3.70/5 | 4.41/5 |
| Vol 13 | 3.57/5 | 4.35/5 |
| Overall | 3.71/5 | 4.49/5 |