| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.33/5 | 3.91/5 |
| Vol 2 | 2.28/5 | 3.66/5 |
| Vol 3 | 2.26/5 | 3.41/5 |
| Vol 4 | 2.57/5 | 3.95/5 |
| Vol 5 | 2.26/5 | 3.67/5 |
| Vol 6 | 2.82/5 | 4.21/5 |
| Vol 7 | 2.18/5 | 3.83/5 |
| Vol 8 | 2.23/5 | 4.12/5 |
| Vol 9 | 2.21/5 | 3.76/5 |
| Vol 10 | 2.67/5 | 3.74/5 |
| Vol 11 | 2.42/5 | 3.83/5 |
| Vol 12 | 2.71/5 | 3.89/5 |
| Vol 13 | 2.70/5 | 4.09/5 |
| Vol 14 | 2.39/5 | 3.88/5 |
| Vol 15 | 2.73/5 | 4.16/5 |
| Vol 16 | 2.44/5 | 3.52/5 |
| Overall | 2.45/5 | 4.21/5 |