| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.97/5 | 3.85/5 |
| Vol 2 | 3.16/5 | 4.04/5 |
| Vol 3 | 3.22/5 | 4.08/5 |
| Vol 4 | 3.17/5 | 4.03/5 |
| Vol 5 | 3.32/5 | 4.09/5 |
| Vol 6 | 3.12/5 | 4.03/5 |
| Vol 7 | 3.18/5 | 3.95/5 |
| Vol 8 | 3.22/5 | 4.15/5 |
| Vol 9 | 3.17/5 | 4.14/5 |
| Vol 10 | 3.19/5 | 4.00/5 |
| Vol 11 | 3.24/5 | 4.16/5 |
| Vol 12 | 2.89/5 | 3.85/5 |
| Vol 13 | 3.21/5 | 4.11/5 |
| Vol 14 | 3.16/5 | 4.13/5 |
| Vol 15 | 3.30/5 | 4.20/5 |
| Vol 16 | 3.15/5 | 4.17/5 |
| Vol 17 | 3.21/5 | 4.13/5 |
| Vol 18 | 3.11/5 | 4.06/5 |
| Vol 19 | 3.16/5 | 3.97/5 |
| Vol 20 | 3.37/5 | 4.17/5 |
| Vol 21 | 3.34/5 | 4.26/5 |
| Vol 22 | 3.20/5 | 4.12/5 |
| Vol 23 | 3.26/5 | 4.13/5 |
| Overall | 3.19/5 | 4.26/5 |