| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.05/5 | 3.93/5 |
| Vol 2 | 3.24/5 | 4.13/5 |
| Vol 3 | 3.30/5 | 4.20/5 |
| Vol 4 | 3.22/5 | 4.08/5 |
| Vol 5 | 3.13/5 | 4.11/5 |
| Vol 6 | 3.31/5 | 4.25/5 |
| Vol 7 | 3.31/5 | 4.20/5 |
| Vol 8 | 3.32/5 | 4.14/5 |
| Vol 9 | 3.23/5 | 4.24/5 |
| Vol 10 | 3.27/5 | 4.13/5 |
| Vol 11 | 3.06/5 | 4.06/5 |
| Vol 12 | 3.19/5 | 4.12/5 |
| Vol 13 | 3.31/5 | 4.06/5 |
| Overall | 3.23/5 | 4.25/5 |