| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.96/5 | 4.14/5 |
| Vol 2 | 3.27/5 | 4.23/5 |
| Vol 3 | 3.26/5 | 4.14/5 |
| Vol 4 | 3.15/5 | 4.27/5 |
| Vol 5 | 3.24/5 | 4.09/5 |
| Vol 6 | 3.40/5 | 4.17/5 |
| Vol 7 | 3.19/5 | 4.33/5 |
| Vol 8 | 3.31/5 | 4.35/5 |
| Vol 9 | 3.46/5 | 4.32/5 |
| Vol 10 | 3.42/5 | 4.23/5 |
| Vol 11 | 3.18/5 | 4.29/5 |
| Vol 12 | 2.58/5 | 3.93/5 |
| Vol 13 | 2.73/5 | 4.14/5 |
| Vol 14 | 2.74/5 | 4.19/5 |
| Vol 15 | 2.95/5 | 4.14/5 |
| Overall | 3.12/5 | 4.35/5 |