| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.06/5 | 4.08/5 |
| Vol 2 | 2.98/5 | 3.95/5 |
| Vol 3 | 2.73/5 | 3.78/5 |
| Vol 4 | 2.75/5 | 3.85/5 |
| Vol 5 | 3.02/5 | 4.07/5 |
| Vol 6 | 2.74/5 | 3.84/5 |
| Vol 7 | 2.36/5 | 3.69/5 |
| Vol 8 | 2.87/5 | 4.07/5 |
| Vol 9 | 3.22/5 | 4.15/5 |
| Vol 10 | 2.94/5 | 4.00/5 |
| Vol 11 | 2.93/5 | 3.93/5 |
| Vol 12 | 2.92/5 | 3.91/5 |
| Vol 13 | 3.06/5 | 4.23/5 |
| Overall | 2.90/5 | 4.23/5 |