| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1-2 | 3.07/5 | 4.51/5 |
| Vol 3-4 | 3.14/5 | 4.51/5 |
| Vol 5-6 | 3.21/5 | 4.55/5 |
| Vol 7-8 | 3.20/5 | 4.53/5 |
| Vol 9-10 | 3.02/5 | 4.54/5 |
| Vol 11-12 | 3.28/5 | 4.54/5 |
| Vol 13-14 | 2.66/5 | 4.44/5 |
| Vol 15-16 | 2.66/5 | 4.53/5 |
| Vol 17-18 | 2.74/5 | 4.44/5 |
| Vol 19-20 | 2.46/5 | 4.39/5 |
| Vol 21-22 | 3.26/5 | 4.55/5 |
| Vol 23-24 | 3.30/5 | 4.52/5 |
| Vol 25-26 | 3.28/5 | 4.58/5 |
| Vol 27-28 | 3.10/5 | 4.59/5 |
| Vol 29-30 | 3.06/5 | 4.57/5 |
| Vol 31-32 | 3.38/5 | 4.64/5 |
| Vol 33-34 | 4.14/5 | 4.66/5 |
| Overall | 3.11/5 | 4.66/5 |