| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.52/5 | 3.96/5 |
| Vol 2 | 2.43/5 | 4.21/5 |
| Vol 3 | 2.83/5 | 3.90/5 |
| Vol 4 | 2.79/5 | 4.17/5 |
| Vol 5 | 2.57/5 | 4.06/5 |
| Vol 6 | 2.45/5 | 3.64/5 |
| Vol 7 | 2.75/5 | 4.12/5 |
| Vol 8 | 2.71/5 | 4.21/5 |
| Vol 9 | 3.24/5 | 4.17/5 |
| Vol 10 | 2.82/5 | 4.09/5 |
| Vol 11 | 2.98/5 | 4.23/5 |
| Vol 12 | 3.10/5 | 4.19/5 |
| Vol 13 | 3.00/5 | 4.09/5 |
| Vol 14 | 2.90/5 | 4.19/5 |
| Overall | 2.79/5 | 4.23/5 |