| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1-2 | 3.97/5 | 4.63/5 |
| Vol 3-4 | 3.91/5 | 4.63/5 |
| Vol 5-6 | 3.04/5 | 4.60/5 |
| Vol 7-8 | 4.06/5 | 4.65/5 |
| Vol 9-10 | 3.77/5 | 4.63/5 |
| Vol 11-12 | 3.82/5 | 4.63/5 |
| Vol 13-14 | 4.07/5 | 4.66/5 |
| Vol 15-16 | 2.79/5 | 4.56/5 |
| Vol 17-18 | 4.07/5 | 4.64/5 |
| Vol 19-20 | 4.13/5 | 4.67/5 |
| Vol 21-22 | 4.17/5 | 4.69/5 |
| Vol 23-24 | 3.43/5 | 4.62/5 |
| Vol 25-26 | 3.27/5 | 4.60/5 |
| Vol 27-28 | 4.13/5 | 4.71/5 |
| Vol 29-30 | 3.78/5 | 4.62/5 |
| Vol 31-32 | 3.35/5 | 4.65/5 |
| Vol 33-34 | 3.33/5 | 4.64/5 |
| Vol 35 | 4.09/5 | 4.64/5 |
| Overall | 3.71/5 | 4.71/5 |