| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.32/5 | 4.11/5 |
| Vol 2 | 3.45/5 | 4.23/5 |
| Vol 3 | 3.52/5 | 4.30/5 |
| Vol 4 | 3.35/5 | 4.27/5 |
| Vol 5 | 3.40/5 | 4.16/5 |
| Vol 6 | 3.58/5 | 4.35/5 |
| Vol 7 | 3.49/5 | 4.22/5 |
| Vol 8 | 3.37/5 | 4.11/5 |
| Vol 9 | 3.47/5 | 4.27/5 |
| Vol 10 | 3.48/5 | 4.25/5 |
| Vol 11 | 3.47/5 | 4.26/5 |
| Vol 12 | 3.40/5 | 4.26/5 |
| Overall | 3.45/5 | 4.35/5 |