| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.67/5 | 4.33/5 |
| Vol 2 | 3.27/5 | 4.49/5 |
| Vol 3 | 2.91/5 | 4.41/5 |
| Vol 4 | 2.73/5 | 4.33/5 |
| Vol 5 | 2.58/5 | 4.25/5 |
| Vol 6 | 2.93/5 | 4.47/5 |
| Vol 7 | 3.23/5 | 4.54/5 |
| Vol 8 | 2.96/5 | 4.51/5 |
| Vol 9 | 2.71/5 | 4.33/5 |
| Vol 10 | 3.11/5 | 4.48/5 |
| Vol 11 | 2.76/5 | 4.41/5 |
| Vol 12 | 2.77/5 | 4.39/5 |
| Vol 13 | 2.74/5 | 4.40/5 |
| Vol 14 | 2.60/5 | 4.40/5 |
| Vol 15 | 2.72/5 | 4.32/5 |
| Vol 16 | 3.54/5 | 4.53/5 |
| Vol 17 | 3.44/5 | 4.54/5 |
| Vol 18 | 3.26/5 | 4.48/5 |
| Overall | 2.94/5 | 4.54/5 |