| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.98/5 | 4.50/5 |
| Vol 2 | 2.96/5 | 4.46/5 |
| Vol 3 | 3.35/5 | 4.56/5 |
| Vol 4 | 2.89/5 | 4.50/5 |
| Vol 5 | 3.45/5 | 4.57/5 |
| Vol 6 | 3.55/5 | 4.57/5 |
| Vol 7 | 3.09/5 | 4.47/5 |
| Vol 8 | 3.55/5 | 4.60/5 |
| Vol 9 | 2.85/5 | 4.41/5 |
| Vol 10 | 2.92/5 | 4.48/5 |
| Vol 11 | 2.95/5 | 4.45/5 |
| Vol 12 | 3.03/5 | 4.41/5 |
| Vol 13 | 3.24/5 | 4.40/5 |
| Vol 14 | 3.40/5 | 4.48/5 |
| Overall | 3.17/5 | 4.60/5 |