| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.61/5 | 3.93/5 |
| Vol 2 | 2.60/5 | 4.13/5 |
| Vol 3 | 2.45/5 | 3.63/5 |
| Vol 4 | 2.49/5 | 3.53/5 |
| Vol 5 | 2.52/5 | 4.28/5 |
| Vol 6 | 2.46/5 | 4.10/5 |
| Vol 7 | 2.52/5 | 4.13/5 |
| Vol 8 | 2.60/5 | 4.18/5 |
| Vol 9 | 2.57/5 | 4.30/5 |
| Vol 10 | 2.40/5 | 4.07/5 |
| Vol 11 | 2.32/5 | 3.76/5 |
| Vol 12 | 2.48/5 | 4.07/5 |
| Vol 13 | 2.48/5 | 3.73/5 |
| Vol 14 | 2.77/5 | 4.20/5 |
| Vol 15 | 2.64/5 | 4.10/5 |
| Overall | 2.52/5 | 4.30/5 |