| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.01/5 | 4.00/5 |
| Vol 2 | 3.45/5 | 4.36/5 |
| Vol 3 | 3.28/5 | 4.18/5 |
| Vol 4 | 3.32/5 | 4.19/5 |
| Vol 5 | 3.46/5 | 4.42/5 |
| Vol 6 | 3.49/5 | 4.44/5 |
| Vol 7 | 3.52/5 | 4.41/5 |
| Vol 8 | 3.36/5 | 4.36/5 |
| Vol 9 | 3.49/5 | 4.42/5 |
| Vol 10 | 3.45/5 | 4.25/5 |
| Vol 11 | 3.74/5 | 4.55/5 |
| Vol 12 | 3.65/5 | 4.47/5 |
| Overall | 3.44/5 | 4.55/5 |