| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.02/5 | 4.00/5 |
| Vol 2 | 2.08/5 | 3.14/5 |
| Vol 3 | 2.18/5 | 2.98/5 |
| Vol 4 | 2.12/5 | 2.98/5 |
| Vol 5 | 2.30/5 | 3.25/5 |
| Vol 6 | 2.20/5 | 3.40/5 |
| Vol 7 | 2.14/5 | 3.33/5 |
| Vol 8 | 2.02/5 | 4.00/5 |
| Vol 9 | 2.22/5 | 3.67/5 |
| Vol 10 | 2.37/5 | 4.00/5 |
| Vol 11 | 2.21/5 | 3.25/5 |
| Vol 12 | 2.15/5 | 2.92/5 |
| Vol 13 | 2.31/5 | 4.19/5 |
| Vol 14 | 2.24/5 | 3.80/5 |
| Vol 15 | 2.16/5 | 3.73/5 |
| Overall | 2.18/5 | 4.19/5 |