| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.42/5 | 3.57/5 |
| Vol 2 | 2.18/5 | 3.25/5 |
| Vol 3 | 2.10/5 | 3.11/5 |
| Vol 4 | 1.97/5 | 3.06/5 |
| Vol 5 | 2.22/5 | 3.43/5 |
| Vol 6 | 2.18/5 | 3.90/5 |
| Vol 7 | 2.08/5 | 3.11/5 |
| Vol 8 | 2.05/5 | 3.07/5 |
| Vol 9 | 2.23/5 | 3.87/5 |
| Vol 10 | 1.85/5 | 2.78/5 |
| Vol 11 | 2.19/5 | 3.73/5 |
| Vol 12 | 1.97/5 | 2.97/5 |
| Vol 13 | 2.21/5 | 3.28/5 |
| Vol 14 | 1.79/5 | 2.93/5 |
| Vol 15 | 1.73/5 | 3.10/5 |
| Overall | 2.10/5 | 3.90/5 |