| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.58/5 | 4.39/5 |
| Vol 2 | 2.28/5 | 3.73/5 |
| Vol 3 | 2.75/5 | 4.32/5 |
| Vol 4 | 2.39/5 | 3.90/5 |
| Vol 5 | 2.43/5 | 4.19/5 |
| Vol 6 | 2.79/5 | 4.42/5 |
| Vol 7 | 2.76/5 | 4.04/5 |
| Vol 8 | 3.03/5 | 4.39/5 |
| Vol 9 | 2.60/5 | 4.12/5 |
| Vol 10 | 2.38/5 | 4.15/5 |
| Vol 11 | 2.85/5 | 4.22/5 |
| Vol 12 | 2.32/5 | 4.00/5 |
| Vol 13 | 2.55/5 | 4.24/5 |
| Vol 14 | 2.60/5 | 4.42/5 |
| Vol 15 | 2.77/5 | 4.29/5 |
| Vol 16 | 2.45/5 | 4.13/5 |
| Vol 17 | 2.69/5 | 4.19/5 |
| Vol 18 | 2.60/5 | 4.36/5 |
| Overall | 2.60/5 | 4.42/5 |