| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.07/5 | 3.93/5 |
| Vol 2 | 3.11/5 | 4.07/5 |
| Vol 3 | 3.15/5 | 4.25/5 |
| Vol 4 | 3.12/5 | 4.23/5 |
| Vol 5 | 2.93/5 | 4.16/5 |
| Vol 6 | 3.21/5 | 4.04/5 |
| Vol 7 | 3.19/5 | 4.03/5 |
| Vol 8 | 3.08/5 | 4.26/5 |
| Vol 9 | 3.25/5 | 4.24/5 |
| Vol 10 | 3.16/5 | 4.08/5 |
| Vol 11 | 3.27/5 | 4.26/5 |
| Vol 12 | 3.48/5 | 4.36/5 |
| Overall | 3.17/5 | 4.36/5 |