| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1-2 | 4.02/5 | 4.63/5 |
| Vol 3-4 | 3.98/5 | 4.62/5 |
| Vol 5-6 | 3.98/5 | 4.63/5 |
| Vol 7-8 | 4.03/5 | 4.62/5 |
| Vol 9-10 | 4.02/5 | 4.63/5 |
| Vol 11-12 | 3.94/5 | 4.61/5 |
| Vol 13-14 | 3.86/5 | 4.57/5 |
| Vol 15-16 | 3.86/5 | 4.57/5 |
| Vol 17-18 | 4.04/5 | 4.63/5 |
| Vol 19-20 | 3.74/5 | 4.52/5 |
| Vol 21-22 | 3.76/5 | 4.54/5 |
| Vol 23-24 | 3.89/5 | 4.59/5 |
| Vol 25-26 | 3.92/5 | 4.60/5 |
| Vol 27-28 | 3.73/5 | 4.53/5 |
| Vol 29 | 3.93/5 | 4.58/5 |
| Overall | 3.91/5 | 4.63/5 |