| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.08/5 | 3.95/5 |
| Vol 2 | 3.30/5 | 4.22/5 |
| Vol 3 | 3.14/5 | 3.93/5 |
| Vol 4 | 3.05/5 | 3.85/5 |
| Vol 5 | 2.98/5 | 3.84/5 |
| Vol 6 | 2.98/5 | 3.83/5 |
| Vol 7 | 3.01/5 | 3.86/5 |
| Vol 8 | 3.23/5 | 4.16/5 |
| Vol 9 | 3.21/5 | 4.16/5 |
| Vol 10 | 2.87/5 | 3.97/5 |
| Vol 11 | 2.87/5 | 4.11/5 |
| Vol 12 | 3.12/5 | 4.14/5 |
| Vol 13 | 3.25/5 | 4.18/5 |
| Vol 14 | 3.19/5 | 4.16/5 |
| Vol 15 | 3.34/5 | 4.12/5 |
| Overall | 3.11/5 | 4.22/5 |