| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.37/5 | 3.45/5 |
| Vol 2 | 2.51/5 | 3.51/5 |
| Vol 3 | 2.32/5 | 3.45/5 |
| Vol 4 | 2.25/5 | 3.54/5 |
| Vol 5 | 2.35/5 | 3.34/5 |
| Vol 6 | 2.33/5 | 3.26/5 |
| Vol 7 | 2.21/5 | 3.48/5 |
| Vol 8 | 2.69/5 | 3.61/5 |
| Vol 9 | 2.97/5 | 3.72/5 |
| Vol 10 | 2.41/5 | 3.47/5 |
| Vol 11 | 2.47/5 | 3.57/5 |
| Vol 12 | 2.58/5 | 3.58/5 |
| Vol 13 | 2.43/5 | 3.53/5 |
| Vol 14 | 2.57/5 | 3.56/5 |
| Overall | 2.48/5 | 3.72/5 |