| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.98/5 | 4.36/5 |
| Vol 2 | 3.04/5 | 4.41/5 |
| Vol 3 | 3.15/5 | 4.39/5 |
| Vol 4 | 3.06/5 | 4.41/5 |
| Vol 5 | 3.14/5 | 4.34/5 |
| Vol 6 | 3.11/5 | 4.41/5 |
| Vol 7 | 2.84/5 | 4.05/5 |
| Vol 8 | 2.92/5 | 4.19/5 |
| Vol 9 | 2.87/5 | 4.28/5 |
| Vol 10 | 3.13/5 | 4.22/5 |
| Vol 11 | 2.95/5 | 4.12/5 |
| Vol 12 | 3.03/5 | 4.28/5 |
| Vol 13 | 2.76/5 | 4.04/5 |
| Vol 14 | 2.94/5 | 4.18/5 |
| Vol 15 | 2.84/5 | 3.96/5 |
| Vol 16 | 2.82/5 | 4.34/5 |
| Overall | 2.96/5 | 4.41/5 |