| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1-2 | 3.26/5 | 4.58/5 |
| Vol 3-4 | 3.90/5 | 4.62/5 |
| Vol 5-6 | 3.84/5 | 4.62/5 |
| Vol 7-8 | 3.23/5 | 4.64/5 |
| Vol 9-10 | 3.98/5 | 4.67/5 |
| Vol 11-12 | 4.00/5 | 4.69/5 |
| Vol 13-14 | 4.09/5 | 4.65/5 |
| Vol 15-16 | 4.09/5 | 4.66/5 |
| Vol 17-18 | 4.09/5 | 4.66/5 |
| Vol 19-20 | 4.15/5 | 4.67/5 |
| Vol 21-22 | 4.11/5 | 4.66/5 |
| Vol 23-24 | 4.03/5 | 4.62/5 |
| Vol 25-26 | 3.57/5 | 4.59/5 |
| Vol 27-28 | 4.15/5 | 4.67/5 |
| Vol 29-30 | 4.10/5 | 4.69/5 |
| Vol 31-32 | 4.16/5 | 4.71/5 |
| Overall | 3.90/5 | 4.71/5 |