| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1-2 | 3.95/5 | 4.39/5 |
| Vol 3-4 | 4.03/5 | 4.42/5 |
| Vol 5-6 | 3.95/5 | 4.39/5 |
| Vol 7-8 | 3.96/5 | 4.39/5 |
| Vol 9-10 | 3.96/5 | 4.39/5 |
| Vol 11-12 | 3.95/5 | 4.39/5 |
| Vol 13-14 | 4.00/5 | 4.41/5 |
| Vol 15-16 | 3.96/5 | 4.40/5 |
| Vol 17-18 | 4.05/5 | 4.43/5 |
| Vol 19-20 | 3.98/5 | 4.40/5 |
| Vol 21-22 | 3.94/5 | 4.38/5 |
| Vol 23-24 | 3.96/5 | 4.39/5 |
| Vol 25-26 | 3.99/5 | 4.40/5 |
| Vol 27-28 | 3.88/5 | 4.36/5 |
| Vol 29-30 | 3.95/5 | 4.39/5 |
| Vol 31-32 | 3.90/5 | 4.37/5 |
| Vol 33-34 | 3.94/5 | 4.39/5 |
| Vol 35-36 | 3.95/5 | 4.39/5 |
| Vol 37-38 | 3.95/5 | 4.39/5 |
| Vol 39-40 | 3.96/5 | 4.39/5 |
| Vol 41-42 | 3.96/5 | 4.39/5 |
| Vol 43-44 | 4.02/5 | 4.42/5 |
| Vol 45-46 | 3.97/5 | 4.40/5 |
| Overall | 3.96/5 | 4.39/5 |