| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.95/5 | 4.41/5 |
| Vol 2 | 3.90/5 | 4.39/5 |
| Vol 3 | 4.03/5 | 4.44/5 |
| Vol 4 | 4.07/5 | 4.46/5 |
| Vol 5 | 3.93/5 | 4.40/5 |
| Vol 6 | 4.01/5 | 4.43/5 |
| Vol 7 | 3.98/5 | 4.43/5 |
| Vol 8 | 3.90/5 | 4.39/5 |
| Vol 9 | 4.07/5 | 4.46/5 |
| Vol 10 | 3.97/5 | 4.42/5 |
| Vol 11 | 3.89/5 | 4.39/5 |
| Vol 12 | 3.90/5 | 4.39/5 |
| Vol 13 | 3.83/5 | 4.36/5 |
| Vol 14 | 4.00/5 | 4.43/5 |
| Vol 15 | 3.94/5 | 4.41/5 |
| Overall | 3.96/5 | 4.46/5 |