| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 1.73/5 | 2.92/5 |
| Vol 2 | 1.78/5 | 3.08/5 |
| Vol 3 | 2.17/5 | 3.23/5 |
| Vol 4 | 2.12/5 | 3.27/5 |
| Vol 5 | 2.18/5 | 3.36/5 |
| Vol 6 | 2.19/5 | 3.48/5 |
| Vol 7 | 2.18/5 | 3.47/5 |
| Vol 8 | 2.02/5 | 3.32/5 |
| Vol 9 | 1.98/5 | 3.30/5 |
| Vol 10 | 2.07/5 | 3.32/5 |
| Vol 11 | 2.06/5 | 3.27/5 |
| Overall | 2.05/5 | 3.48/5 |